Nothing.
Great car, really fast, very confortable, great interiors.
The interior is very well designed, and it comes with great seats (racing style).
The sound system is suberb. My came with a blaupunkt Cd radio with 4 speakers, 2 tweeters and 1 subwoofer beautifully inserted in a dead space in the trunk.
The performance is suberb, it really pushes you to your seat, and icredibly the 6th gear really has power. You insert it at 40kmh/h and it takes you to 200kmh/h. REAL MACHINE.
I totally agree with your review. I owned a Punto Sporting for the last four years and I can honestly say that I didn't have a thing wrong with it in that entire time!
It's a great little car and lots of fun to drive. I would recommend it to anyone.
I've now switched to a Seat Leon, but I'm missing my Punto like mad.