I have no issues with zpool really.  Just the typical random DDOS issues, or the recent payout bug that happened (I was personally un-effected, but everyone was taken care of).  Id say no more than any other pool would have.

remember;  the pool code itself picks which exchange to transfer and sell to... we can't make any assumptions where the coins were sold....

... you said you had to pay for a transfer fee as well;  zpool covers the TX fees, so I am unsure what you are getting at by this ....


Look at the spread of the coins mined.  often it's within the 10-30% range on alts... (I watch and make short plays on the market everyday now).  when you are shown a block reward;  I believe it shows the lowest market "sell" rate;  and (I believe) when it receives the funds back from the exchange, the pool corrects the estimates based upon what people actually paid for the coins.... but frankly, I don't know how often it does it, or under what conditions.  Grain of salt.  IT will take some serious researching of the pool code to fully understand how it works.

Holding the 24 hour graph of the DGB price from yobit over my pending balance graph;  you can see the same humps bumps and dips in the same time frames (almost) between the two graphs....   this is more than coincidence.  I saw it heavily when DGB went from 700 to ~400 a few days back.

Now, I bet this "estimation error" people see would not be near as prominent if the pool calculated everything based on the highest buy order, instead of the lowest sell order.... but again;  the market is in constant flux.


Also;  every time I do some spot calculations on 24 hour profitability based on my hashrate;  it tends to be pretty close to what I earned in the previous day....

What is your payout coin?