I would stay away from this site for now.  In their FAQ they have an explanation of their "provably fair" system, but I can't find anywhere on the site where you can actually verify the rolls for yourself.  Just saying that you are "provably fair" doesn't make you provably fair.

I like the simple design and I like the fact that you can gamble with a number of different crypto-currencies, but I'm not going to try this one out until they are actually provably fair.  I recommend that others do the same.