They take a fair amount of getting used to, especially if you get an ortholinear variety. You might find yourself not really enjoying it out the gate, but it'll force you into better typing posture and you'll grow to love it over time and hate the times you have to type on a standard keyboard. I have an Ergodox and the ortholinear aspect took a while to get used to and settling into a function keys layout I liked took another good while. Expect to be worse at typing and less productive at the outset. Your hands and wrists will thank you in the long run, though.

I got my piantor yesterday and i really like it so far, it was a bit of a challenge to set everything up in a way i like. And my writing speed has deceased from 140 wpm to about 30. But that is just a matter of relearning to write on this keyboard and unlearning years of bad writing practices.