Great lens! Expectations totally exceeded!
The optics are good, but I have two problems, one minor and one I think is major. First the minor, the aperture ring is unclicked so you have to constantly look at the lens to pick the correct one and it is easily moved off mark. Second, the major issue is that the distance scale on the lens does not actually show the actual distance. I tend to zonefocus for street photography and found that 1.5m is actually around the 5m mark on the lens.
Great lens! A little soft when wide open but overall delivers great quality!