The problems with the CC box (that I am aware of) are:
- F1 relay - any old relay talks to the pump - it can get burnt out and "over-run" the use of the F1 pump causing it to die. Changing an F1 relay is a DIY and very cheap job.
- F1 pump - this is less common, and probably less likely to die if the relay is changed often. It is an expensive part if it goes wrong (I think £1k).
- Clutch wear - This is a talking point, some people's last for ages, and some people get through their's a bit quicker. I think [EDITED] 20-30k is a fair mileage, but stand to be corrected. A new complete clutch costs around £1.5+k from an independent to fix. The first clutch that was brought out with the car was a single tang, this was replaced by a dual-tang that lasts longer. You are unlikely to find any car that has the old version.
One thing that is difficult with the CC box is parallel parking. I miss being able to balance the clutch.
All that said...touch wood...I have never had any problems with my CC box. I also absolutely love it. It's just such a great way to drive, to change gear and for me adds to the whole Maserati experience.
One thing I would say, as soon as you get it, change the rear boxes to Larini, Tubi, straight-throughs or something other standard. It sounds beautiful!