Solid UI, good customer support and high profitability. Been mining with them for a couple of years and never had any major issues. They run a bitcoin pool as well as Dash, ZCash, horizen and a few other coins . also their profit switching algorithm gets some more uplift and revenue. They also run a data website called Hashrate Index that tracks ASIC prices across models and the value of hashrate amongst some other statistics. Overall a solid player in the ecosystem with a good reputation & transparency.