I've been mining with them for some time and got 40% less coins than expected over a 2 day time period and the hash was relatively constant - what is more hashrates vary hugely even though my rigs are totally stable. Sent 4 e-mails to the owner of the pool and never got an answer back, removed my miners.

Until given proper explanation, I would not recommend suprnova pool.

On the other side, I've been mining with suchpool and been receiving exactly what was predicted.