Personally I have a Keychron V6, witch is just ok for it's price, but my complaint is that QMK have enough power to simply read a text file on a small flash memory even a raw memory flashed via `dd` wrapped by a simple script and made the customization much more comfy, without the need of recompile the fw, downloading ~1.5Gb of stuff simply mapping a physical key or key combination to a set of keycodes.

Second RANT to ALL keyboards OEMs: please add a damn service to print easily custom keycaps, a small example, being from the EU writing in few languages every day I've chosen the EurKey layout, witch actually does not exists on sales in some pre-build keycaps set. I have mapped differently some keys, MOST of them I know from memory, but sometimes being able to see the key is a very nice to have thing. Ok, keycaps normally are not really printed, meaning it's not cheap to produce custom ones, but if you damn ask 300+€ for a keyboard and someone buy it I'm pretty sure a custom keycap set does not change the game much.

Third RANT please STOP making cherry, OSA etc profiles. Very old IBM keyboards have solved the height issue with a simple parabolic support, there is NO DAMN REASON to make flat support and different height keycaps making limited room to move them on the keyboard.