The "tour" is not really a tour. It's just a guy talking. We were fortunate enough to sit while the guy droned on. Very boring. You stand in one place, shifting from foot to foot for an hour while he talks. And when you go into the Shelby shop during the "tour," you don't get close to the actual cars in production. You're behind a wall. But it's free, so I guess you get what you paid for.
The cars in the showroom are cool. Look at them, and forget about the "tour." If you stick to that, you'll give the place four stars.