You have 4 reviews already, they are Kingbit, Casinobit, Fortunejack and Mbitcasino. Among those 4 casinos, I only play at Fortunejack till this day. The first two casinos is not really familiar to my ears, never heard about them before. Fortunejack is the only one that has active representative in this forum, so I will stay there instead of moving to the other casinos you have reviewed.
If you mind to share, what makes you consider that those 4 sites are the best bitcoin casinos? Are you playing there regularly so it is based on your own experience?