Is Coinminerz reliable?

Hi guys, I’ve been mining at 150MH/s on coinminerz for 3 days and in the dashboard of my wallet of their page, it doesn’t have nothing on balance owing, and there’s was a block discovered yesterday and this night. It also doesn’t show the real hashrate of my rig (it always show less than I have and fluctuate a lot to zero, when I’m pretty stable really). Should I hop to another pool?