Got one of these about a month ago. Basically, it's a ergonomic keyboard that has keys that are different heights (in a 'wave' to conform to the shape of your hand). It's similar to lots of other ergo keyboards out there, but the big difference is that this one maintains uniform key size (and spacing) which means it doesn't have a learning curve from a regular keyboard. Since I have to use a lot of machines, I was never willing to "get used to" the seperated design that many ergo keyboards have. The wrist rest is some sort of pseudo-leather type material that feels really good, and doesn't stick like a rubber rest. The keys don't depress as far as most keyboards so they are easy on your fingers/wrist as well. It has tons of special hotkeys, most of which work in Ubuntu without drivers. Overall, I'd definitely recommend this for anyone looking for a new keyboard. Incidentally I have the corded version because I am not a big fan of wireless keyboards. I am glad to report that even as a USB connection it works great. The first USB keyboards I used had issues with multiple simultaneous keypresses (bad for games!) and had weird lag / keyrepeat issues. Of course that was quite some time ago. I had gone back to a native PS/2 connection KB because it was much better. This is a great keyboard. I liked my old Microsoft MultiMedia Keyboard v1.0a plenty, but after extended use (i.e. project due dates nearing) it was starting to get uncomfortable.
