I really love this lens, I'd rate it 9/10, the bokeh sometimes looks a bit too angular such as the one you can see here when diaphragm is wide open : [link] but it gives an excellent rendition of details and it allows a lot of light to go trough. It's a very good lens, I'm quite happy with it, it's also one of the reasons I'm not changing my current camera for a second hand Canon EOS 5D since it's not compatible with full frame sensors (I'll change for a 7D or 60D so I can keep my 60mm).
Thanks! I've got a 550D at the moment and tried looking around on google to see if the lens would fit it. But I haven't found anything so far. I don't suppose if you know if this lens would fit it do you?