I had not seen this thread before, but I have seen a lot of pictures taken with this lens, and I have never been disappointed by what I saw. Seems to be a very versatile lens with well corrected optics.
Every time I think about picking up a standard zoom, this lens also comes to mind, and after a lot of consideration I end up not buying the 50135 f3,5 (after discarding all other options, including the 35-70 f2,8 and others)