We did the U-Drive 2.5 hour Hells Revenge Tour and it was great. Aaron was our guide, he did an excellent job - he was fun and safe at the same time. Never been in a UTV/SXS, let along driven one and it was awesome. Definitely was scary when you're starting that first climb, it's pretty intimidating, but once you do that your confidence builds. Was really cool going over obstacles or up and down rock formations that I wouldn't even think of trying if I was on my own.
There were 4 of us in our vehicle, my 19 year old son and 23 year old daughter also drove for part of the trip - they loved it and did just fine. Wife decided to pass as a driver, she had a death grip on the safety bars most of the time.
Would definitely recommend this activity. Booking online was simple, filled out our waivers beforehand and check-in was a breeze. A short but thorough safety briefing, then you're off. I liked the fact that we didn't have to wear any extra gear such as helmets, goggles, or gloves, yet felt extremely safe in the vehicles.