I never heard of them but I am intersted to see what you report back here, whether it works out for you or not.
To have an overview of most of the cloud mining sites i use: cmmonitor.com
They spend some coins into these sites and try it out. Most cloud mining sites are listed there, but not all.
I searched there for a site where i could buy with paypal and this was the only paying one and they had good reviews so i decided to spend into this site.
They ordered the new Antminer S5 on may 25 and they have to go to mining before 09 june or i get refunded my investment. So i expect the begin of mining at 06/06. (What a nice date btw)
I will post all TX ID's i get from their payments. Payments are made every day - when your account balance is over 0.005. Mine is not so i will get a withdraw every 2 days.
You will hear from me then.