I would set aside outright scammers, they give real guys a bad name. Even though my history is short, with the help here, I've been lucky enough to meet one guy I would say was great, three guys who were good, in that they were fun and I would like to meet them again, except one turns out to be not offering the experience I want, two guys who were average, some minor misrepresentation and small time scheming, and one guy who was just poor. So it would break down to 14%/28%/42%/14%, so most guys have been good or better.
If it shows anything, the average and poor guys were not recommended by anyone here.