I have driven them countless times, almost bought one 3 times lol.
There were 2 downsides when I was looking, and I couldn't get over 1.
#1 was gas mileage. Highway is rated at 23, so if you baby it, you might see 25 at 65mph. I was traveling 75 and it said something like 18mpg. I could have easily gotten over this if it weren't for #2.
#2 was DSG. I owned a 2006 GTI DSG for 40k miles. It was great initially, but got really boring after the honeymoon period wore off. The R32 begs for a 6mt. It works well with the 3.2, but it just sucks the fun out of the car.
I absolutely LOVE the way the MKV's look (obviously), and if they came in a 6mt, I'd own one.
Other than the 2 above, there isn't much to dislike about the car. It is a bit portly, a bit slow, and a bit expensive for most.
The DSG has a learning curve. You will have to learn how to drive the car to get it to do what you want seamlessly, such as if you are accelerating, and want to downshift, you need to let off the gas for a split second. This will switch the second shaft in the trans from going to the higher gear, and have it go to the lower gear, allowing the fastest downshift possible. There is plenty of info online about this kind of stuff.