I'm wrapping up install of the following items:
-ST X Coilovers
-Powerflex Front Control Arm Rear Position Poly Bushings (ALK)
-SuperPro Front Control Arm Front Position Poly Bushings
-ECS Tuning Front Subframe Locking Collar Kit
-All new rubber/mounts (front/rear top mounts, strut bearings, coil spring isolators, etc.)
-I spent a small fortune on all new hardware (most of the stuff taken out was TTY anyway)
I had no problem installing the coilovers, pulling the control arms, or dropping the subframe. Install went smoothly with the exception of the lower locking collars at the control arm brackets. The Powerflex brackets have a recessed spot for the bolt where the OEM bracket is flat (I assume because of the geometry change that the brackets provide). I sanded down the outside of the bushing so it would fit in the bracket recess but the mounting hole in the Powerflex bracket is elongated so the collar doesn't really do anything anyways. For this reason I decided not to use the lower bushing at the control arm brackets. I have the top one in place and I think that's the important one.
I also noted that one of the four bolts that goes up through the subframe into the steering rack was missing. I'm not sure if there are multiple steering rack part revisions/designs, but my steering rack does not extend over that hole, so there's nowhere to thread the bolt into. Weird but I'm not going to worry about it since it's been that way and hasn't hurt anything.
I also decided to use some rust encapsulator paint at a few spots on the front & rear control arms, and rear subframe. They were beginning to look pretty rough with flaking paint & rust spots. Eventually I'll pull all 4 control arms and powder coat them. If I'm feeling particularly bored then I'll drop both the front & rear subframe and powder coat those as well!
Anyway, enjoy the pics and I'll update with my driving impressions after I get the car aligned next week. I will say that I took a short test drive and am VERY impressed with the control arm bushings.
Full Flickr Album here and select pics below:
but it managed to slightly swipe my right rear door. You can see a clean mark from the center of the door to the wheel where he got me, and a small scratch. Oh well, it could have been much worse--just one more thing to fix before I wrap my car. In the meantime I'll give the springs a little more time to settle and fine tune my ride height before I get an alignment. 
Awesome man!!!!! I have the super pro mount and I didn't have an issue with the 34 MS collars I have, since the super pro one is flush like oem. I just recently got a set of the upper bushings from super pro, so I would have to have the oem TT ones pressed out. I noticed a HUGE difference in in steering, although I switched to aluminum Passat spindles and Audi TT control arms at the same time. Instead of powder coating, etc, I would suggest going the alum spindles and control arm route if rust is an issue for you.
We have single piece Passat/TT alum subframe instead of the 3 piece one we have and I may swap it in when I do my new strut mounts/bearings next week. Also, you can get the alum rear subframe for the A3 as well....
I got my key fob folding module and everything coded correctly. My windows, sunroof, and mirrors close when I hold the lock button on my FOB. Now I have 2 door modules for folding mirrors, mirror dip, etc. I rewired my old side mirrors for mirror dip and oem puddle lights. I have the fold motors for a cabrio golf sitting around as well, I will probably give them to the person that buys the mirrors. they may have better luck disassembling the cabrio mirrors to swap the folding motors....