They're awesome cars. I have an auto TT 2+2.
I personally think they leave all skylines for dead in the looks department.
If you buy one that has been looked after (bit of luck helps) then you won't have any extra issues than your average 15 year old car. Keep up on the maintenence and you'll be fine. I wouldn't buy one unless you are a car enthusiast and preparred to spend money on it and not skimp on things.
The interior rules, I love the layout. Much nicer looking that most cars. The targa top is wicked and who cares about the lack of room - it's a sports car