I'm very pleased with mine. I hope to get out and do a few portraits today to test and then possibly tweek the AFMA which by rudimentary tests doesn't seem too far off. The color and contrast rendition is not as nice as the 40 Pancake imho and requires more contrast, shadow and black adjustment in LR but sharpness and saturation seem nice. The build is solid. Very pleased. The focus ring is on the front, I didn't think anyone expected that to change but it's a decent size. Sure it's no jelly jar with a 1" wide focus ring but it's fine. I know this will be a lot of folks first STM lens and will be new to needing to have the camera in operation, i.e. back button focus, shutter half depressed, what not- in order for the manual focus to work.
There is NO wobble in the mount, very solid and it mounts smoothly. Much easier than the pancake which has a very tight fit. I shot a video (which I rarely do) and was pleased with the outcome. Poorly lit room, mixed illumination, ISO 800, f/5.6 and it came out very well.
So far I would say the best value in an EF lens. Something I've been saying over and over for the pancake. Maybe it's a tie. However it's it's not low light, I'll still take the 40. I like the IQ much better.
