Its very reliable, i can easily set up new workers, view stats etc. Never seems to give me grief. I havent really tried many others. Main point is I like to see whats going on with my stuff and have full control.

That alternatepool.com is horrible because it doesnt let me see anything. All it does it show my BTC and hashrate. It doesnt let you see the coins they are mining either. Which means they could be mining a very profitable coin and skimming some off the top.
hashco.ws looks decent but still i dont think i will be able to view individual workers which is too bad.