A couple of weeks ago I’ve got my 50mm back. I had to return it because it had some serious front focusing issue.
The replacement looks okay, I’ve performed a live-view AF micro-adjustment test, this one and I only had to add +2.
I’m using it for a while now, it’s definitely worth the money, but I think it’s recommended to use it between f/2.8 and f/11.
For example at f/1.8 you will likely to see a lot of chromatic aberration and ghosting.
Like in this image:
Don’t get my wrong, the sharpness it’s pretty good, the bokeh is okayish, but you need to fix that chromatic aberration…
Here is the full size, fixed version:
But considering the amount of money it costs, it’s still the best way to get better than the kit lens cheaply. I highly recommend it to anyone, but you will need a little bit of luck to get a good copy.