II've owned my TT for 8+ years and 115,000 miles. It's had it's share of problems and is not cheap to fix: dead water pump, broken steering rack, two broken ABS sensors, broken wheel bearing, dead ECU, misfiring cylinder, two broken instrument clusters, blown Bose speaker, etc. I still feel its one of the best looking cars on the road and it STILL turns heards today eight years later but it's dying at only 115,000 miles and I need to sell it and something at least a little bit reliable. There is nothing like this car out there anymore though. The new TTs just aren't the same.
A TT with quattro is an absolute joy to drive and simlply amazing in the rain and snow. Eight years after I bought it, it still turns heads and I get comments on the street. Large trunk with fold-down seats makes it practical too.
Better quality all around on Audi parts. Sensors fail all the time, the plastic inside breaks. The shocks are junk as where the original tires. The quality of the leather on the seats is sub-par.