So far nothing at all.
I'm really enjoying this car. Mine is silver and it looks really sharp. When I first got into the Scion tC I was impressed as I shut the door. It just feels so solid and very well built. I like the way the interior looks, with the aluminum/metal accents. It's really sharp. I love how it came with that amazing panoramic sunroof - that's really a nice touch. I also get lots of use out of the IPOD hookup that allows you to store your IPOD in the armrest/console and you can then control it via the stereo, and even with the controls on the steering wheel.
Power wise I wish it had a bit more power, but for the cost of the car it's fine as is. You really do get a lot for your money. I bought mine about a month ago and it's a 2007. I'm very glad I decided to get one. I'm expecting it to last as long as any good Japanese car out there.
Go take one for a test drive. You'll like it!
Test drove the 06 tc the other day - My Comments:
Speed - just OK
handling - just OK
Riding comfort - just OK
Its really an OK car. I think I will go for a RSX Type S.