outfitter
Well-known
I've had a few over the years. Like most lenses this old, some are ok and some are very good. My current one is almost, but not quite, as good as my Leica 50 2.0 collapsible Summicron. It's sharp, but can't resolve like the Leica. But then it only cost 30 bucks! Like all things Soviet, you generally have to buy several to get a really good one.
You raise an interesting point, all lenses regardless of the brand have good examples and bad examples in the sense that there are differences that would lead one to choose on over the other. The FSU lenses are complicated by poor assembly QC and cheap mounts that are prone to wear etc. On the other hand the FSU optics are proven designs capable of fine performance.