Seems pretty cool, up to 5040dpi if you really feel the need to run it that high, looks fairly ergonomic, some cool appearance features...but you would be hard pressed to get me to ditch my G9 for a newcomer to the gaming gear market.
The G9 is shorter, but since it is wider and more ergonomically designed, it doesn't feel "weird" like some do. I personally don't like the longer ones, like razer. The G9 just has a feel to it that anyone can appreciate.
Example: last night a buddy of mine stopped over for a few thanksgiving beers. He is an architect, by no means is he a computer enthusiast. He was like "ooh I like your keyboard that looks cool (saitek eclipse, backlit blue) and sat down at the PC. He put his hand on the mouse and says "omg, this is the most comfortable mouse I have ever touched. Where can I buy one?"
Within 2 minutes I had him sold on a new G9 from bestbuy.com ($45 bucks). Hard to complain!