I never read casino reviews. I think all these reviews are biased because they are paid. But maybe I'm wrong. And if I want to play in a casino, I just go to the site and try everything I like, I do not need to read the review. I can only give one piece of advice to those who write casino reviews, make them as short as possible. I like short reviews.
Not all of them are biased or paid for, but I reckon that there is a point on the issue of of who evaluates the evaluator on this. It is a question of having some of the users sign off a review, so the rest may know who is behind the result of backing the review. Older users, well known in the forum or with good reputation are a sign for those looking for a solid review, non-paid.
Whether admit it or not, sometimes I suspect they might be paid to give a good review of one of the casinos. This happens because we don't know who is judging and their review site doesn't have clear names of judges. Plus, I also don't know if they actually try to play at the casinos they review or just rewrite what the casino says.
Even so, sometimes I still read casino review sites because in some ways they are still quite helpful and sometimes I look for the best promos among existing casinos through casino review sites.