Personally I prefer the numpad-less keyboards, I don't use number entry that much and the reduced space between keyboard and mouse (I'm not a keyboard / vim wizard) helps with comfort / RSI prevention. I use an Apple wireless keyboard.

That said, I would like something a bit more ergonomic or tactile, maybe, but all mechanical keyboards are at least 4x as tall as this one is - the flatness really helps prevent RSI in my case. I guess a wrist support would already go a long way, I prefer to keep my wrists on the table.