Mine has the CAVE Engine, is running Stage 1 and the engine seems fine, Okay so it does consume a little bit of oil, but not an astronomical amount, The only thing I am worried about would be the gear box or clutch giving way when it gets Stage 2 put onto it. But thats just something I will have to deal with when it happens. Although There is apparently a DSG Update to go onto it so we will see.
However the moral of the comment is that I have owned the car for a year or so now (Late 2010 Model so 60 plate), Got it at 9k miles, It has now done nearly 35k miles and seems to be perfectly fine so far, No misfires, No bad history, as above a little oil consumption but nothing too eratic. But overall a totally amazing car!!
Edit: I did however see a Leon Cupra at my local dealer that really tickled my tastebuds... I just cant warrent the expence yet (i say YET lightly lol)