I just hooked up my G500 and G13 yesterday from the 40 dollars at bestbuy thing. This is still tempting though. I have been looking for a good price on one of these again.
Got mine a while ago with MiR and I gotta say, I am not impress at all with it, after about 6 months, I still can't get comfortable with its ergos. It could very well be my hand but I loved the G7 more than this one.
The thing I do like, comparing it to the G7, is that I don't have to deal with batteries and I can use it for gaming or regular computer work... that's a plus