Hello Bitmain,

Thanks for offer, you are very good and trust company with on stock miners (i have ANTminer), but:

2.2 BTC will never make ROI on miners with next difficulty - next extimate 2300000000 will make 1.27 BTC/month.
So miner 2.2 BTC will never refund in mining :|

It's the best offer in the market for now, but the price is to big for the market reality.

Maybe You are developing something stronger that S1?

Regards.