I have not much time for review writing (and I’m not the best in it too:), there are already some reviews and I assume there will be many more soon, but since it is relevant to the community and since the bigger reviews often lack some technical details, some information from my side:
I tested Fedora Kinoite on a StarLite StarFighter 16" Laptop. I had the model with Intel 285H, 64GB memory (website now says new orders are LPPDR5-7500 but I think - not sure though - at the time of my order it was for DDR5-6400; not sure what the shipped device used to be), 2 TB storage (M.2 2280 NVMe SSD PCIe Gen 4×4), 4K Screen.
The device is compatible to Fedora out of the box: kernel taint is 0, everything works out of the box (including speaker, microphone and camera). No patches, no third party software/repositories necessary.
The vendor says the screen is with PWM, and the frequencies are at brightness 25% ~1kHz, 17% around 500Hz, 5% around 200Hz. These are good values that outcompete many devices of well-known vendors: having a high sensitivity to see flickering, I went down to 15% brightness and did not perceive flickering (everything below was not useful due to brightness of the environment).
Battery life time of a Kinoite with disk encryption (only aes128 though, not default) with everything set to power saving mode (DDR in Coreboot + power settings of the system) and a Firefox browser open was predicted by the system to ~10 hours (average day light environment and the screen brightness was set appropriately to that, I didn’t try to keep it “as dark as possible” or so). Having worked a little with it, the development of the prediction seemed the ~10h to be realistic. Unless there is extensive read/write on the disk, I expect default encryption will achieve a comparable result, and with further customizations towards energy saving, more might be realistic too.
The device is with the current Fedora kernel only s2idle, but the vendor says the patches for s4 are already upstream for the vanilla kernel and so I assume it is a matter of weeks or months for this to arrive on Fedora. Due to earlier experiences with the vendor, I trust that is true.
I have not tested the firmware updates, but I assume the issue is the same as with the StarLite: it seems something related to mtd needs to be added to fwupd before Fedora can do this through the usual means, but StarLabs has begun to add commits for this upstream, but it is not yet ready, and it is unclear when this will be finally finished. In the meantime, I assume the StarFighter can be firmware-updated like the StarLite with Ubuntu or so.
However, this also shows that the vendor is working upstream to get stuff patched, which implies review and wider testing, rather than forcing users to add third-party-repos or patch their kernel or so with stuff no one has reviewed than the vendor themselves (being open source does not guarantee review nor QA). This is a big advantage of StarLabs imho, as it captures the security and stability guarantees of a wider community, rather than breaking these guarantees at the end of the chain (which can occur with some other vendors).
The firmware is derived from coreboot, a well maintained firmware, and it reduces users’ vendor dependence.
The fact that untainted kernels can be used makes it also easy to file kernel bugs upstream.
If you have issues, you can also open a ticket in their github repo: they have already implemented stuff in the firmware users asked for (e.g., password protection). I think there is space for collaboration among users too in their repo, maybe helping to over time decrease the burden on their maintainer. Keep always in mind that firmware adjustments can be a lot of work, even if the outcome feels trivial. So don’t expect wonders or so 
The keyboard issue is already known, about keys sometimes being double-typed: StarLabs says that’s because one screw is fixed too strong, but the user can repair this themselves and they will lead you through the process. I cannot test it as I don’t want to temper with the device given that I have to return it, but my experience with them is that one can rely on their suggestions. So I assume the keyboard double-type issue is effectively solved, and if you experience it, get in touch with them to get details about how to do this (feel free to confirm here when it worked out). The keyboard cannot compete with my old Lenovo T16 G1, it feels a little more rigid, but if the double-type issue is solved, it is ok (and the device outcompetes my old T16 G1 in most other respects).
Given the hardware contained, I find the price ok actually. I disagree with reports its too much, as there is very expensive and high quality hardware contained (especially the screen is gorgeous), and given the customer service of StarLabs (up to them implementing firmware features if customers ask in github tickets), I think one should compare them to the prices of other vendors not before the other vendor’s premium support is added to the price, even if StarLabs formally does not offer that. Given the <hardware specification> → <price> calculations (not considering the service) about this, I find that worth to be mentioned. The general quality of the device is very good. I cannot confirm the case that the detachable camera has contact problems: when I attached it, it always worked fine immediately, but I think users should be careful as obviously dirt layers or so can end up over time in between the camera and the screen to which it is attached too.
All that said, I already indicated I will return the device: the reason is the cam and microphone (the latter was the critical element). For many users that is a minor thing, and so that device can be great for many. The issue already elaborated in other reports. To me, it feels like hardware limitations, but I’m no expert in this field and StarLabs says that is software (we talked only about the microphone case though). I cannot exclude that this can be fixed by software later (after all that is all very new hardware) and consider them as a reliable source due to earlier experiences, but I have only 2 weeks to return, and I cannot take that risk: the microphone the way it is at the moment, with default software of Fedora, is dull/hollow which makes it very hard understand people talking, I hear some electric interference and sometimes voices can become clinking too. The first can make it hard, at the worst impossible, to understand what the speaker says, and the last can be unpleasant for the audience. I use the same default tools I use for my other devices. With the default software tools the issue can be mitigated a little by playing with the settings (mostly by decreasing the mic volume), but not sufficiently: because external devices or additional software are no permanent option for me for several reasons, and because I rely on being able to offer a good experience when doing talks and video conferences online, I have to make this a kill criteria: it felt a trivial reason, still does, but I cannot ignore it.
That said (again), if people are fine with external microphone, and when the impression counts an external camera as well, this is a great device that still offers a very good experience, and with all the services that are effectively offered by the vendor and how supportive they work with customers (even if limited to email), I still find the price ok. And who knows, maybe the cam + mic issues are solved by a software update soon as well. I hate to return it. But I keep them on my scope, and maybe, I will end up with such a device in future.
Concerning the worries about the keyboard quality found in some reviews: I obviously cannot dismiss them, but keep in mind that StarLabs still offers replacement parts for their oldest devices. When I checked this at the time buying the StarLite, it was either 5 or 7 year old devices for which still replacement parts were offered, and the prices were appropriate/good, much cheaper than replacement parts of the big vendors. Given that it is very new, there is not yet a page of replacement parts for the StarFighter though, but I assume it will be there soon. For me, the keyboard feeling being a little more rigid than my old T16 would be itself not a reason to return. Beyond keyboard (minor thing), cam, mic (maybe solved software-sided in the future), that is a great device, worth its money!
I cannot make predictions of course about the quality over time.
Other StarFighter users: feel free to add details here if the issues get solved over time (especially keyboard, cam, microphone), but also feel free to add other stuff.
About the StarLite (I never had time to post something about it): I don’t use it myself as I don’t need a tablet, but I set it up and became a little the “maintainer” of it → the quality of the device itself is very good. All Fedora compatibility I elaborated of the StarFighter can be transferred to the StarLite 1:1. There is a minor bug in one of the Intel drivers in the kernel (so software thing), but I have filled that upstream and Intel is working on it (I already verified some patches Intel suggested). The bug is minor and does not cause symptoms other than scary error logs. The only negative point is the external attachable keyboard that can be ordered along with the StarLite: again, you can find reviews. It feels to have not the best quality, and the keys led us to worry about life time. However, I assume no one does extensive writing on a tablet, and it is ok for normal things to do. The user is ok with it. And having it about a year, worries about lifetime of the keyboard have not proven applicable, it’s still working properly. Keep in mind that the attachable keyboard is not by default part of the StarLite, so it is not a dependency. We’re happy with the device, and the tablet itself is great.
It’s not too detailed and I did not do a detailed review of this text, but I hope it’s expressive/understandable and wanted to document it for the record, so that others can use it I know the pain if you want to buy a certain type of device and no reviews for your OS/kernel exist.
