They are nice but please also look into the atreus, it uses a column stagger and has least some angling for your wrists. It’s both a finished product and also a set of instruction for DIY. Otherwise r/ergoMechKeyboards has a plethora of unibody and split small keyboards

Keyboardio sells both the Preonic and Atreus (https://shop.keyboard.io) fully built with a variety of key switch types.

I use the Preonic as my daily driver and really like it - minimal but not too much so. I tried the Atreus like the idea but it was a touch too minimal for my taste - certain key combinations I used a lot at work were too much of a finger twister!