The actual UTV experience was amazing! Our guide John was fantastic - highly recommend! However, the experience getting to the UTV activity was not fun. Viator did not provide any information so when we went to the meeting place, we were told we were in the wrong place, that made us late for the excursion. Then we get to the place we were supposed to be (apparently) and were told they couldn't take us. Luckily the company was understanding and let us rebook the next day....but that's not all. When we were on the phone the day before with the company, we made sure to ask where we meet our guide and she told us the wrong location! John, our guide, luckily had my number and called me and drove to meet us where we were. Clearly there's a lack of organization on both Viator and East Zion Adventures' end.
Ask for John!