From July 14th, 2012 to June 2nd, 2015, 67% user give 5-star rating, 33% user give 2-star rating. for GCVote chrome extension.
This is a great tool to remember your own experience and give feedback. Most likely more to other cachers then owners, though. The question is, and that's maybe why Groundspeak never implemented a feature like this: would you really choose to avoid a cache because of a bad rating?
Can't remember my password and there's no way to retrieve it.
Great!! Thanks :)