Heard of them, but definitely no experience with them.
There are some people on here who have played them, couldn't tell you who though. The brief posts I do recall reading did say that they were pretty loose and profitable if you got on with a reputable one.
You should probably tell us about your general location. It will be different if you are in Europe, Asia, etc. Look for good rakeback deals as that will be a large portion of your profit. Games are soft enough without rakeback and some sites where rakeback is not available are so soft that they are worth it even if you don't get rakeback. GL.