what about cex.io? I've read somewhere on forum that it's good. I've checked out the site and it looks dissent, I didn't register thou.
cex.io offers OVERPRICED and Never-ROI mining contracts. The maintenance fee is 50+% which means they only give you less than half of your profit and take the rest as fees for electricity and datacenter upkeep. Their GHS are way overpriced, 0.002++BTC while other cloud mining contracts offer 1GH at 0.001 with lesser maintenance fees.