I think Nanopool is a scam.  I wrote on their Zcash thread on how the pay was so low.  They responded that it must have been a bug and they've just updated their wallet system.  I have 6000K on that pool and was getting paid less than my buddy who have only 4500K on Suprnova.cc.  We're talking big money discrepancy since Zcash was paying very high during the first week.  The pool definitely was very stable, I left flypool because it was unstable.  Nanopool = Nanopay!   Even their payment system was terrible first week, they say payout 4 times a day but didn't pay for like 24hrs.  They fixed it after I complained on the thread.  Check their thread for twim1211 comments.  That's me.  Let's hope they clean up their issue, otherwise no miners going to want to stay.  If you mine there, check their stats.  Even their estimate pay stats shows like 25% less than whattomine even when your 6hrs average max current hash rate.   I do like their interface.  That pool cost me a ton of money with the slow payment first week as each day ZEC would drop so much.  Their payment is very fast now, but their pay rate for your hash is still questionable.