Well, the review can help but then we need to experience things to know the actual manner in which the site operates especially the way their handle issues as it relates to players' accounts and withdrawal another important aspect is the probability of the casino's how their system works. This and many more are the things to determine the trust level of a sportbiokie.
I think the reviews are good enough,especially if you read them in the ANN thread in this very section where each casino has their own ANN thread.If I see that people only talk good about a specific casino I for example as a slot player don't need to know the internals of the casino as most casino links direct their site to the slot providers.In this context I think is enough to know that the casino is trustworthy,processes the withdrawals super fast and has not unfounded scam accusations against them.
In initial days the reviews on ANN threads are always positive unless there are multiple issues. But, what about those casinos that do not have an ANN on the forum? For those in my opinion it is better to avoid reviews on third party websites. It can be always helpful to monitor the live if that casino has one or you can give it a try by playing with small amount.