Our booking started with a text the day before telling us when and where to meet our driver. Juergen was on time, efficient, knowledgeable, and friendly. He is one of the best tour operators I've had.
The jeep was very comfortable and well air conditioned. We were able to get to see a lot of the park. Juergen pointed out popular shapes in the rocks as well as a lot of the vegetation. The views were stunning and the tour was easy to adapt to physical abilities. The only thing I wish would have been mentioned is that the short hike is through very soft sand. If you have ankle, knee, or hip problems, it's probably best to sit that part out. Even though I didn't sit it out (and I should have due to a very bad ankle), I was still able to really enjoy the rest of the tour. Even if you choose to stay in or near the vehicle, there's still plenty to see. It was a great break from the strip and I wouldn't hesitate to book this company again.