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UPDATE 9//1816 - We unplugged our S7s on 9/2/16. In Dec. 2015 we grossed $300 with one S7, in March 2015 we grossed $250 with that same, single miner. Between the halving, the price of bitcoin going down and the hashrate of our pool almost doubling, the S7s aren't profitable anymore. We were also tired of the noise. I've deleted earlier versions of my review, so the comments may refer to the older postings. Instead of buying miners, we would have come out ahead if we had bought Bitcoin at $250.