I have recently (within the past month) bought 2 S1's...

Within a few weeks BOTH failed (1 due to a bad controller board, 1 had 2 bad "banks" of 8 asic chips (16 total).

It's been a week with the RMA department and they had me take pieces from one to make 1 working one, and finally got the go-ahead to ship the other one back (which arrives to them on Monday).

I likely wont see a replacement for at least another week.  Needless to say I am currently loosing my ass.  Bye Bye ROI.

I have expressed this concern about my ROI due to THEIR faulty product to Bitmain Customer Service and every time they ignore me.  I asked questions within the RMA emails and they responded to everything BUT my requests for either a coupon or a couple miners pointed at my pool while the RMA process is happening.  It's like they read it and just laugh.  I didn't ask for anything outrageous, I simply asked to be compensated for a failure in their product.

I thought they were a stand up company, but now I am having my doubts.  Maybe the prices ARE to good to be true, especially now that it has dropped even more.  I spent $950-$1,000 ish in product around the beginning of the month, and only have about 1.5 weeks of actual mining since I got my miners... As of right now I cannot recommend them.

Something must be going on internally as I used to hear good things about them (which is why I chose to do business with them). Unless things change FAST, they likely could get to the point where they can't honor ANY of their promises.


**Positive Note**

The only reason why I am still giving Bitmain a shred of hope of redeeming themselves is because of Juan @112bit.com.  1 of my units I ordered from him, 1 I ordered directly from Bitmain.  Juan IS what customer service should be.  He always gets back to me quickly, is understanding and you can tell he actually cares about his customers.  He also has been helping me with BOTH units even though he only sold me one of them.

Thank you Juan!