I would give it a "0" if that were possible. Four of us paid for this experience and the only seats left in the vehicle were the very back row. When the engine started, it was like standing right in front of a jet airplane on takeoff. There were no speakers and no headsets (although there was an "outlet" for headsets). The "guide" had a microphone but we could not hear one single word she said. Plus by the time the one hour trip was over, we were practically deaf from the noise. We complained to the guide and her response was, "You shouldn't sit in the back". Well, they pack the vehicles full and we had no other choice! Bad experience on what should have been a really fun outing.