I've noticed that when BBB handles a complaint for an accredited business, BBB sides w/the business almost unconditionally & suppresses complaints from public view. So i'm thinking it's not a good idea to trust #BBB accredited A+ businesses when compared to non-accredited A+ businesses. Non-accredited implies that they actually have to work for their rating b/c they don't bribe the BBB.
@tilduke #Yelp is orders of magnitude more corrupt, richer in copious misinfo & embroiled in countless shenanigans, so I'm not sure exactly what you are suggesting. If you mean phpbb forums out in the wild, well there is perhaps good info there but it's too sparse and scattered to be practical. Requesting attorney general records of complaints yields good info, but it's often by snail mail.
@resist1984
Any single source of reviews is going to be susceptable to bias. My point was that I don't trust a company, such as the BBB, who's entire funding model is based around charging businesses for preferential listings. As with everything read a variety of sources and good and bad reviews and make up your own mind.
@tilduke I hate a lot of things about the Better Business Bureau (#BBB), but it remains indispensible.