My fiancé and I and another couple decided to do this on a whim and we did not regret it! Driving the cars was super fun and exhilarating! The drivers are really friendly and encourage you to drive the hell out of the cars! Don't worry if you have no idea what you're doing, they talk you through the whole thing and have controls if you need a little extra help here and there (but they only use them if necessary, the driving is all you!). Once we finished driving, we got to go on a few laps with them driving, and THAT was ridiculously awesome. You get air off the jumps and drift around the corners like crazy! Our tour guide who drove us out there, Draven, was really cool and super knowledgeable about all things Vegas. During the drive out to the track (just over an hour), he told us all kinds of cool stuff, and we got to stop at the Hoover Dam and take pics. Draven also had lunch waiting for us after we were done racing. Also, when we first got out there, we got to go on a giant monster truck over a few jumps to "get our adrenaline pumping" lol, it was so much fun!
If you're planning on doing this experience, make sure to leave the whole afternoon. We left our hotel on the strip at 12:45 and got back at 6:20, which was perfect because we had a show at 7pm. If you've already walked the strip and are looking for something to kill an afternoon before your evening plans, I highly recommend this experience!