BSRs are easy to repair, and are actually fairly durable, but they really don't perform very well at all, except for a few of the better modes that used MM cartridges like the 510 and 610. The cheaper ones with ceramic cartridges range anywhere from mediocre/somewhat tolerable to complete crap. The ones with plastic platters are the worst. They rumble badly, usually have noticeable Wow and Flutter, and nearly always run way too fast.
Right now, I have one of the cheap ones with the ceramic cartridge and plastic platter in a later model Magnavox console. After having gotten used to a real turntable, it almost pains me to listen to the thing. After I overhauled it, it ran probably a good 5% too fast, if not more. I couldn't tolerate that at all, so I removed material from the motor capstan until it ran at the correct speed. The W&F is still there, though and it's terribly annoying to me.
Some people say they destroy records, but I think that is a little overblown. It's pretty much a non-issue on the ones with MM cartridges. The ones with the slim headshell and Tetrad ceramic cartridge honestly aren't that bad, either. Mine is set at 4 grams, and tracks well with a new stylus. I wouldn't play expensive/rare records with it, but I have no problem playing common records on it.
That's my 2 cents worth.