I've put 10,000 miles on mine ( second owner, just turned 50,000.
There have been NO issues, other than one's I have caused myself by my incessant tinkering.
My paint is near to flawless, minus the few front end chips, the top has never failed me.

I can tell you symptoms you will see if you leave the MAF disconnected, or forget to plug that vacume hose to the thing on the drivers side fender well. Done both several times.
( NOTE: I have to unplug the MAF to remove my C320 engine cover )

I paid 15.5K in Jan 2011 - still worth every penny.