my wife and I rented two 4-person RZrs with our teenaged boys on Friday 2/27 and had a tremendous day!
The RZRs ran perfectly without any trouble and got us to wherever we wanted to go in the Tonto National Forest. I would definitely recommend renting for the day and don't lose track of time like I did---it is so easy to as you are just overwhelmed by the beauty of Arizona that you don't see from a jeep tour.
The staff is very helpful and accommodating. In fact, we were supposed to rent the 2 RZRs on that Monday but rain was forecasted. Without any problem they changed us to the Friday. Lucky for us too as we enjoyed crystal clear blue sky and warm temps to shake off the cold Northeast winter we had.
Definitely try this place. You will have the time of your life.