The lens is sharp, quick and accurate focus, fairly nice bokeh, compact, decent build quality, reasonable price. I have not used this lens on a full frame though, and that may be where some edge softness may show up.
Based on the pics in this thread, I think it does great on FF. I think people pay way too much attention to their 100% crops... it might just be this FL (I have a MF 28mm and love it), but something about the pics in here are just special 






