Some early ones had a clutch squeel caused by vibration of the clutch cover that was replaced under warranty. Other than that no problems and the best thing you will ever do. Get it bought and get yourself on the Pistonheads Forum for some friendly help and banter.
Any problems with owning the V12 Vantage so far? Like maintenance issues etc. I'm thinking of getting one. Its probably the last manual V12 anyone will ever make.