my wrists hurt a lot, though I am probably prearthritic and more sensitive than the average bear. also, the corners dug into my (chubby) thighs. I think a thinner person would enjoy it more.

I tried swapping in a 100m stem so I could raise the seat a bit more (lowering it helps with the wrist pressure, but at some point you can't pedal well), but it didn't do the trick.
I should add that Karl Ulrich, the designer, was remarkably in providing customer support (answered my emails himself)