I've played at ThisisVagas (Rival) and in the beginning i was lucky and won 150$, but from that moment it was losing and losing with no reward. I don't play big amounts but in six or seven deposits i've lost about 200$, and playing at 0.5/bet, the last 50 $ lasted about 40
minutes.
The same at Sun Palace: nothing and nothing constantly, at last i had to close my account.
Regards and good luck