Had mine 2 weeks, very happy, fun to drive, more than ample power for my
driving skills (when the sole passenger), outstanding feature set for the
price, great audio system.  However load it up with three people and it
could use an extra 50HP.

I'm very happy with mine.  First year issues were mostly things like
rattles - nothing major.  It's very fun to drive, and a great car for
the price.

To get more opinions/info, you can check out the following TSX forums:

http://www.acura-tsx.com
http://www.tsxclub.com

I have had mine over a year now (silver).  No problems.  I get positive
comments every day, since they are not that abundant on the road.  Some
people are almost drooling when they ask about it.

My wife has been driving hers for over a year.  Its fun to drive (when I get
a chance), especially compared to my 4 Cynlider Camry.

Also, my wife was hit in the rear, 20 mph, and it totaled the other car and
only left minor bumper damages to the TSX.  So it seems to be a real solid
car.  I feel much safer with her driving it now, after this accident.