I've never been a fan of the suprnova pools.  Maybe I didn't mine on them long enough to account for luck (the longest I stayed on any of their pools was about 2 weeks) but my earnings were always significantly lower than what I should have been getting according to whattomine and compared to other pools.  They're usually one of the first to open pools for new coins though, which is why I keep ending up on them, but as soon as a fairer pool opens up, I switch asap.