Being that I live 20 minutes from USH, I was able to ride this firsthand. It's not great as you see in the YouTube videos. The only thing that's really cool about it is the illusion of immersion, especially in the front car. The screen is in front of you and around you so you really feel like you're there. The graphics are okay, but it does feel a lot like GTA.
Now that this is coming to USF, I have a thought about how the cars will work: To save on space, I think it's possible they can have just one or two cars instead of four. That would prevent taking up more space than necessary and open up more room for extra showspace/queue space.