I have a black '75 that came on a FED 2. Has white and green lettering. I have a silver '80 that came on a Kiev 4AM. Both lenses seem to be in very good shape and work well.
However, when I compare their "sharpness" with my Bessa cv lenses, or my Super-Takumar Pentax Spotmatic lenses, they don't seem to come off too well.
What I do like about them, and this has been mentioned by others, is that sort of "old time" look to the images.
Kiev4A: I like your police officer's comment. I once was a detective sergeant on the California/ Mexico border. One day I was having coffee in the Imperial County Jail, chatting it up with the desk sergeant and the chief jailor. "How many you got in here now?" I asked the chief jailor. "148," he answered. "I wonder what they're all in for," I said, in a sort of idle wonder. "All for the same thing," he answered. Surprised, I said, "What? You mean 148 guys in here for burglary? I find that hard to believe." "No, not all in here for burglary," he said. "All in here for not being smart."