I backed them on CrowdSupply some years ago and although it took a while to be delivered have used it extensively since and even purchased a second one for at home & the office. A huge positive while waiting for it was the regular, informative status emails from the founder.
Now they are on to v2 [1] with backlighting and better keycaps.
The "Agent" firmware is also regularly updated and makes customising the keyboard a breeze. I won't go extensively into the functionality here but it's worth checking out.
I am in no-way affiliated with UHK but if anybody is looking for a split, open source, customisable keyboard I would highly recommend.
[0] https://uhk.io/
[1] https://ultimatehackingkeyboard.com/blog/2020/11/05/introduc...