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Positive and reliable ratings for me are already enough.
Rating sites don't seem very credible as a basis for trust, let's call it the most popular Trustpilot. Ad managers may employ sockpuppets to provide false ratings and reviews.
I even prefer to read user experience reviews on this forum as my main consideration for choosing a casino, where customer service is also a discussion.
Reviews should really not be your basis, its bette to analyze it on your own and experience the whole thing by yourself. If you still believe on a good platform that pays fairly then you should do your part as well. To lessen the stress of doing this, you can try to gamble on the top gambling site and you can easily know if its worth it to play with them or not.
Every individual has his/her own preferences and interests. It is impossible to choose the best online casino for everyone simply because people have different preferences and interests. For example, for a new player who has never gambled before, making the first step into the gambling world may seem overwhelming, and most probably such a person prefers a safe, relaxed and comfortable casino that will allow him to ease into the web casino industry. On the other hand, for professional gamblers, the situation may be different because they are usually looking for the most rewarding and challenging online casino they can possibly play at. Therefore, choosing the right online casino for the right kind of gambler may seem difficult, but that does not mean it is impossible.