Just installed my VWR springs in my 2015 6 speed MT 3 door myself. I think it sits pretty perfect and the ride quality is great! I have only put a couple hundred miles on them but it defiantly feels flatter around corners and reduced body roll. I highly recommend the Audi tt rear coil pads, makes the car sit perfect and they were only $24 from ecstuning. Part # for them is in my signature.
For the Picture with 3 stack on top of one another the top one is stock height when I first got the car, middle is with the fronts installed only, and bottom is all 4 corners installed and how it sits now. I'm sure the springs will settle once I put some more miles on.
Edit: I also installed ECS tuning's Heavy duty strut mount and strut bearing for the fronts. It was very good quality and I would defiantly recommend them. I was over 26k on this car so I thought it would be good to swap them out and i'm glad I did.
Also for the people doing the install them selves I found it easier to take off the 3 16mm nuts holding the ball joint to the lower control arm so you can easily take the spindle off of the strut. Just be careful and HANG UP the spindle on the sub frame or control arm, sort of how you would hang up the caliper doing brakes. Once its loose it will drop and rip your brake lines on the way to the floor. Just take your time, make sure you double and triple check everything, be safe, and have a friend there to give you a hand. The torque spec on the ball joint nuts is 100nm and u can reuse them as they are not torque to yield.