Apart from that one payout issue in January with their software upgrade, they have always been reliable with payouts. They just recently teamed up with Spondoolies as well.

I myself had been doing a series of payout comparison videos with them and Gaw Miners since September. Since stopped though because Gaw Miners stopped hashlet cloudmining etc.

Genesis Mining has an official thread here.

https://bitcointalk.org/index.php?topic=602022.0