I just got mine yesterday. I bought an Amazon Warehouse deal. It's a brand new revised model (smooth finish). Not bad for $372.00
However, I think I'm going to return it, for a few reasons.
1. I didn't realize how heavy it was. It's twice as heavy as the Canon 1.4. That's a big deal because I bought it as a walk around lens.
2. I ran some tests last night. Mounted on a tripod, it front focuses. Not a big deal because I can manually focus just fine (my favorite camera is/was my A-1).
3. Doesn't want to focus in low light. Could be the camera (Rebel XS), but I doubt it because my other lenses focused just fine in the same situation. Bigger deal because it's hard for me to manual focus without the light.
4. The lens is "scary looking" because of the large frontal element. Bad for street photography.
Bottom line, I think I'll return it and get the Canon model.