I agree with you that it's very hard to identify fake from true reviews. There is no quality control when it comes to the Internet, everybody can post what he wants online, true or false will be hard to distinguish. That is why I stopped trusting in random review websites which show too many positive reviews. Sometimes it's easy to spot fakes if the wording of reviews all is very similar, but most of the time it's not. This is also why longstanding forums like this one are so important. When you have trustful members who have been around for 5+ years issue an accusation that I will give it much more wait. Relying on our fellow gamblers is what gives me trust in a sportbook. If other member have a good experience than I trust the same will happen to me too.
Different experiences have different stories, there are gamblers who have good experiences with the gambling site while for some others have another take, you can use it as a basis but make sure to continue observing how the site performs, you should always be aware that using spare money to test the site and start establishing good relation within the customers service will allow you to see how the team works with their participants.