all casinos claim to be the best for all gamblers, but it differs actually when you come to experience not only through their games and bonuses offered, but also on how they treat their customers through their customer service as it could be another factor that will make them the best from all casinos.
I totally agree with this.
Personally, I prefer playing on casinos where the customer support and admins are friendly and listen to their customers' suggestions and make them feel confortable. This, imo, what determines a good casino even if they have high house edge and don't offer many bonuses like other casinos do.
After all, we gamble for fun not to make money!