Hi
I would say i play a few on line casino, bet356, 32red, stanjames, william hill and mr green.
The best pay out ratio i have found is stanjames across all of their games and i have a hit quite a few large wins including 4k (twice) on game of thrones
By far the worst on line casino has to be Mr Green truly awful, and that's across all of the slots i have played. the worst offender was their own Mr GREEN moonlight, it is truly staggering the amount i have lost on this game, i got in touch with mr green regarding this slot and my RTP was 82%.
Have found that only wins come about, once you have wagered large amounts of cash. i must be 7k down on this one game. I would stay well away from this slot.
Westworld