I echo that times 10.
I purchased a new aluminum iMac 2.0GHz last year, and it came with one of these superslim keyboard (wired with the keypad)...
From a "looks" standpoint, it is quite an awesome piece of equip, it would be fine to pack with a laptop for having another external keyboard...
BUT - I have been groomed and trained on the feel of a fullsize depth key Mac keyboard, since my first LC II, on through the platinum ADB keyboards, the G3 and G4 black keyboards, and then the white keyboards. I found myself running words together, missing the period key alot, just having a hard time typing really complex things really fast (URLs, blogging, etc) that I do everyday. I just had to go back to the "normal" keyboard, the White and Clear one (non-slim non-aluminum) - the Apple Keyboard that came with the White iMacs and the Original Mac Pro. I am back to using this keyboard for about a month now, and I am not going to turn back around to the slim one ever again. I think this time....Apple reaaaally missed the boat when trying for the "future/ergo" design on everything, they butchered the keyboard into this non-responsive tap toy. Sorry, don't like it. Never will.
Long live the best (now discontinued) keyboard that Apple ever made: