There is a thread about it here:
https://bitcointalk.org/index.php?topic=1737602.220

Also, it's not a very reliable hardware. Support is slow and if you don't live in China, cost to fix it is high, very high (you have to pay for both shippings). I had issues with mine and if you look at the other forum it's common to these machines to break.

And also a few people complaining about only having 50% of the hashing (it happened to me).