I love my Das Keyboard. I used to get some painful cramps during work (programming). I tried a couple keyboards that helps somewhat, namely Microsoft's old-school natural keyboards, and also the happy hacker keyboard, but I'd still get wrist cramping if I typed long enough. Haven't had any issues at all with Das Keyboard.

The only drawback is that now it feels strange to type on keyboards without mechanical switches.

I love, love, love my Das Keyboard. It has more of a click than the Model M's clang, and the tactile feedback is great.

"...it's even available in a key-less design"

Surely the model with blank keys is the one every Hacker News reader should be going for? I was quite disappointed when they started making one with inscriptions.