Re: have anybody used this clamp for their brake install (doN_R6)
I just used a tool like that this past weekend to replace the rear pads on my 2000 GTI VR6, and it worked fine. All you need is a 3/8" ratchet and an extension and you're good to go. I had to use a Dremel to get the tool to fit correctly, but that only took a couple minutes. Using the cube tool requires a little elbowgrease, because you have to supply the pressure to push the piston back in yourself; you have to push hard and turn at the same time (there's no clamp or thread to help). I had a friend help me, and it went fairly smoothly. Once you get the piston going in, it moves fine.
We did need to use a regular piston tool on one side (you know, the threaded clamp type), because all we could do was rotate the piston -- it wasn't moving in at all. After just a tiny push in with the regular tool though, we were able to push and turn using the cube tool. It definitely would have been easier with the special tool, but I'm glad I was able to save the money (the cube tool plus the regular tool were $15, instead of the $60 I saw for the special tool).
That was all for original-size brake work though -- I don't have any experience with putting in big brake kits. Hope this helps anyway!