I urge anyone considering this group buy to do your homework before investing:

https://bitcoinwisdom.com/bitcoin/calculator

Using the values:
- 800 ghs hash power
- 2700 USD for hardware cost
- Monthly charge of 250USD

This hardware will NOT break even.  Not at 20% increment in difficulty, not at 10% difficulty increment... Only at 8% difficulty increase.

Please correct me if I am wrong, but I simply feel bad for people investing in such a group buy without understanding the hole they put themselves in.