This is easily a five-star event, but it depends largely on the person. My wife most likely would have given it five stars - she loved (almost) every minute. On the other hand, I was sick almost immediately. I am not normally a motion sick kind of guy and even took Dramamine before hand.
The pilots are all pretty cool, everyone in the place seemed nice and very professional, but it is the planes that really sell this place. Holy crap. These planes are incredible. Even I could grasp how powerful and capable they are, and I know virtually nothing about aircraft.
It was expensive, but it was well worth it - even getting sick, I'm still glad that I did it.