What do you guys think of these guys?

https://www.cloudhashing.com

Offering 10Ghs starting in September. Is it in any way a good idea to jump on board? They claim a return of 50BTC for essentially 10BTC (to keep it easy) ... though if you pump the figures into coinish calc, it tells you tou will make about 2BTC profit over two years on its default mode. If you put in difficulty increases of 15% then its never.

Still... i'm tempted. Certainly not going to get an asic any time soon. Thoughts?

Someone talk me out of it. :-)