Did someone that you were trading with tell you to go on this site to complete your deal?

If that is true, then the guy you were dealing with was running this escrow scam. Basically he'll request escrow, and recommend this particular escrow which is probably run by himself or one of his buddies, and once you deposit bitcoins into that site, you'll get scammed.

The legitimacy of the site is 100% scam. No questions about it. The design is poor and there's only like 4 pages in total on the site.

If you want legit escrow, use one of the on-forum ones, there are lists of them in services.