This car is really fun to drive, especially stick. I found it to be underpowered however and always had to work for torque since it peaks so low and at high rpms. However, once you learn to time everything correctly it becomes a joy to drive.
I had problems with my transmission (which are common). The gear gear kept popping out and if you tried to keep it in there it would grind. The second gear was about to go in my car (but if you read the crsx forums, you'll find tonnes of owners have second gear grind. These things really begin to take a toll after some time and destroy the enjoyment of the drive.
Otherwise, great built quality - clutch will last and last, and is also very light.
Light clutch, sharp gear changes, otherwise reliability. Looks great, always gets great comments.
But then its so nice that it gets stolen (lol, thats what happened to mine)
MORE POWER. More toque. Also a traction control system or a dif or something.
OH and an auxiliary jack! Like come on, a tape deck???? In a 2006?
Other improvements: Brink the car back! lol