I carry the black model in my laptop bag and use it daily. I think I'd rather have a Mighty Mouse or an HHKB, but I can't argue with the price of my [gift] G84-4100. It's hard jumping from the TP2 to the Cherry in terms of layout, but once I get the layout in my head (about 20 seconds) I'm off to the races. Which for me is about 40 words a minute. =-D (total guesstimate)
Considering the price of the HHKB, I'll probably get the new Mighty Mouse from Unicomp when it comes out. But (cough cough) the keyboard in the new Lenovo Thinkpad I should have by then may totally rock my world and I won't need an external (cough cough). Yeah whatever.
The ML switches are linear and non-clicky. Not a bad board if you frequently use it in a room full of people you don't want to piss off. =-D