I just did the rears on my car, took around 2.5 hours with a second pair of hands helping. I found it easier to use 3 jacks: one to raise the car, one to raise/lower the suspension arm as needed, and the third to raise or lower the disc brake (suspension hub) as needed.
The difficulty came from the fact that you need to adjust the last bolt in 2 directions, left right and up down. So while I could get enough leverage with a wrench, I couldn't maintain the support long enough to line the holes correctly.
With the 3 jacks in place, all I needed was a big old screwdriver to position the holes.
Just did the fronts, took again about 2-2.5 hours. I used this tool:
http://www.ecstuning.com/News/Schwab...Kit/ES2652181/
21mm for my 2009 with EDC.
Didn't get an EDC fault, but I think I messed up a brake sensor because i got the yellow car-on-the-list symbol and I noticed one of them hanging at the front. I'll check it next week when I do track pads.