If you are playing on stars 25nlz or below, the Zoom pools are unbelievably fishy (and getting fishier everyday). There are adjustments to be made if you are playing zoom (not gonna get inta that, as it will just kick off a BQ p**ssing contest) but basically stars 25nlz and below are very beatable.
I quit ps 50 nl reg speed because all the table selecting, changing, managing drove me nuts and somewhere along the line pkr is supposed to be fun.
Haven't played zoom 50nlz and above so no comment on those....yet
and yes, I know Stars rakeback sucks the big hairy meatball, but whatever, I like playing with a lot of fish, so it works for me