1. They have a strong server setup that is well defended and there don't seem to be any "known" issues with the site at present.
2. The account security is tight with 2FA and also some kind of IP / Browser agent connection for additional "device" security.
I think they show good technical ability and good operation of the site.. I doubt for now anone is getting into that account, Unless they hack the admin.
If they could hack the "admin" then they could get anyone's funds on the site and not even just the 1 btc. Then it is safe to say that this site probably has the best security features among the others? Combined with 2FA then it is almost unpenetrable unless someone with some skills actually could get into it