This was the best trip from Vegas to the Grand Canyon/Hoover Dam that I have every been on (and I have been on about four). The worst was on a huge bus a few years back, it was cramped, smelly and I couldn't see much of the view of the desert. I remember i kept my ear buds in the entire time.
Traveling with Pink Jeep is a much much better time and definitely worth the extra $$, Our guide John Holmes told us the history of old and new Vegas and kept the ride entertaining with trivia about the landscapes, plants and animals on the way. I wish now that I would have gotten a pic with him :(
Overall highly recommended