I did a few hours research at the weekend on the RR forums, and its literally scarred me off them. Im gutted.
From what i was reading it's a pretty much nailed on certainty that your gearbox is going to go between 80k and 110k miles, ever single air suspension setup seems to develop multiple faults seemingly every year, and there are a whole host of other complaints occurring frequently (steering column replacement, alternator/battery issues, an endless list of electrical gremlins etc).
In the 5 years i've had of 350z ownership, other than standard maintenance i've not had to spend a penny on fixing issues with the car (touch wood), so to go to this level of unreliability is quite off putting.