I'm currently mining from minerion.com which has a nice 0.1% fee, 0 transaction fee, hourly payout and no issues so far

when I started mining, the block difficulty has just increased 4 times to 12.66, and after 1 hour of mining with overclocked i5-4690K, I just got 0.3 coin, that is quite bad, the cpu hash rate is 125 KH/s (the pool rate at that time is around 8 MH/s), the time between finding the blocks is 1 hour

it's too slow, so I switched to GPU mining, I use tpruvot ccminer at https://github.com/tpruvot/ccminer/releases
command line is ccminer-x64.exe -a hmq1725 -o stratum+tcp://minerion.com:3747 -u -p c=XCOIN

(note: tpruvot ccminer is for nvidia gpu)

using GTX 1080 capped at 60% power, the hash rate shot to 5700 KH/s (50 times faster than i5-4690K)