I bought a 2010 GTI in October of '09, and it was the second MKVI GTI my local dealership pulled off a truck. I didn't buy the first one because I didn't want leather or nav and I wanted the third pedal. I basically wanted the plaid seats with every other option (minus nav).
As of this second, I'm just shy of 56k miles. All the issues I had with my car occurred in the first 10k miles. It was mostly just loose bolts that needed to be adjusted and basic new car teething issues. The only major issue I've experienced was a nasty electrical short that had the car in the shop for about two weeks. But since then, it's been trouble free (knock on wood).
I've stuck to the 10k OCI and have taken the car to the dealership for servicing each time. I've done all the maintenance myself on every other vehicle I've owned, but thought I'd see if I noticed a difference in how the car aged by paying extra for a dealership technician to do the inspections. So far so good.
I don't really get the statement that these cars are more maintenance intensive than anything else on the road. This has been the lowest maintenance car I've ever owned (clearly DSG owners might claim otherwise). Even Toyota wants you to bring a Camry in for servicing every 5k miles, VW only asks that you stop by every 10k.
The only long term issues I'm worried about would be the rumored (and very rare) timing chain tensioner failures, water pump failures, and direct injection related carbon buildups (which I'm told aren't nearly as bad as they were on previous 2.0T engines). So I intend to have the water pump and a variety of timing chain parts replaced at 100k just to be sure.
Otherwise, what is there to worry about?