In a word - BLAST! I did this last summer when a friend was in town and it was unbelievably fun! We stopped off at a gas station first and our driver let us pick up some brewskies to wash down the desert dust during the trip. We told our driver to "bring it" and boy, did he bring it! Our butts were off the seats (thank god for seat belts) more than they were on them because we were air-born so much. WHAT A BLAST! We had another family with us whom we didn't know, and they had two kids (around 8 to 10) and their shrieks and roaring laughter just made it that much more fun. We stopped out in the desert to learn a little about the plant life, but the highlight was flying through the air and getting roughed up inside the Hummer (yes, count on a few bruises if you egg your driver on). It's pricey, but damn it was fun!