It's hard to get authentic when you're up that far north! Their presentation looks nice, but it's the taste that matters. Even it it isn't pretty, if it still tastes great it comes you coming back. Southern New Mexico and Arizona have a lot of authentic places that are awesome, but that's a long haul you guys. Even here in southern California we have some really good places.
They have a nice view there though and a nice building, that's a plus! Brazilian BBQ is awesome but expensive. All you can eat meats don't come cheap!