My wife and I both drove 10 laps each on her birthday (Audi R8 for me, Aston Martin for her), and it was just an incredible experience we're still talking about a week later. The instructors were excellent--it was really a thrill to have them encourage and cheer you to go as fast as you could safely go around that track. We made the right decision to get extra laps, because 5 simply isn't enough to get comfortable with our own skills before we could really get going. An unforgettable experience, and we just can't imagine not coming back to do this during some future trip to Vegas.