We purchased the 10-lap race and chose trucks for or adventure. The instructions were simple, the track was well-marked with cones, and our instructor (Ray) was great!
The overall experience was fun, without question. It was great that we were able to stop at the Hoover Dam on the way over to Arizona to get to the track.
Our "tour guide" was not the best when it came to customer service, that was really the only "downfall" of our trip/adventure.
We would have definitely preferred to be able to drive ourselves out to the track from Vegas so we could have enjoyed more time at the Hoover Dam, etc. along the way. Unfortunately, this wasn't an option according to the people we booked the adventure with.
Though it was a fun experience, it's not something we'd choose to do again when in the area simply because it wasn't something that we left feeling like it was worth spending an entire day of our vacation doing (it was about 6 hours for approximately 15 minutes of race-time for a 10-lap purchase).