Here's a membership site I'd take with many grains of salt.
http://theeroticreview.com/main.asp
In order to be a "VIP member" & be allowed to read the full explicit review, you must either pay $20/month or submit two reviews/month. As a result, guys have a handy incentive to post phony reviews. So most of them are fake. It's obvious from the replicated language taken from previous reviews or the SP's website.
Still, it has some nominal value. If an SP gets nothing but raves or pans, you can get some idea.