Well, this thread seems to have been dragged up from the past, but what the heck . . . I love my GF so here it goes:
I've been on my new 2004 Tass for about a month now (purchased on clearance in June 2005) and absolutely love it. I had an older Trek 850 which I hated to see go but man . . . there's just no comparison. The Tass is light, fast, fits me well, and climbs like a mountain goat.
The only thing that caught me off guard is the bike length. I carried my Trek in the back of my Pathfinder laying virtually flat with the front wheel pointed up about 30 degrees; the Tass has got to be a good 3 inches longer (I guess that is the genesis geometry at work and why the bike feels so good) and I have to have the front wheel up at 90 degrees just to get it in the back.
The bike is such a pleasure to ride, I take it out every chance I get (coffee breaks, lunch breaks, etc...) even if it is only for 10 minutes.
Unfortunately I hurt my back about a week after I got it so I haven't been able to take it on any trails, but man am I looking forward to that now that I'm actually able to walk upright again.