McDonald's Cafeteria - the "Campus Arch"

I've got to ask. It's the cafeteria/restaurant at the McDonald's Global HQ in Oak Brook, IL. Has anyone been there?

I've heard rumors that the food there is prepared as it originally was in the 1950's, and that they have experimental items that they try out there. It would make sense, since the test kitchen is in the same building.

Here's the only page I could find on it.
https://foursquare.com/v/the-arch-at-...

I'd love to hear some first hand accounts of the food there.

Thanks,
Mr Taster
(Who hasn't eaten a McDonald's burger since watching Super Size Me and reading Fast Food Nation, but is really curious nonetheless.)