I have it and some of the volleyball shots at www.flickr.com/photos/corysteiner/
were taken with it. My only comparison to the 70-200 2.8 IS II was when I bought the zoom and returned it after using it once. I found the prime image quality to be significantly nicer which was very unexpected. Of course, my shutter speed was always at 1/500 or 1/640 and I try to keep the shutter speed fast whenever using it. Have some pretty nice soccer shots with it too (that I'll soon process and post on my flickr page), but a zoom would be "better" overall for soccer; I think.