I have two friends who use the 28/2.8 on APS-C bodies (one has a 60D, the other has a Rebel <mumble>). IMJO, the 28 is kind of useless on the APS-C. It's wideness is lost with the cropped sensor, and as Salty said, it's a full stop slower. I shoot available light almost all the time, and for me F/2 is fine for most locations. It's a "big stop" between F/2 and 2.8.