For those that have a UHK or are thinking of getting one, we have an unofficial Discord server at https://discord.gg/b4z4rfv which is also tunneled with ##uhk on Freenode. Welcome if you want to discuss any UHK matters. :)
Personally I am very happy with my two UHKs (one for the office and one for home, though for obvious reasons they are both home now). I have stopped using a mouse and use the mouse layer exclusively now for working, though on my work one I have a prerelease version of the trackpoint module that I use. Being a split design has made it easier for my hands and finally forced me to learn proper finger technique.
Personally I am very happy with my two UHKs (one for the office and one for home, though for obvious reasons they are both home now). I have stopped using a mouse and use the mouse layer exclusively now for working, though on my work one I have a prerelease version of the trackpoint module that I use. Being a split design has made it easier for my hands and finally forced me to learn proper finger technique.