We visited the Grand Canyon this past October and signed up for one of Canyon Dave's tours as a recommendation of our hotel concierge. While the tour guide seemed very nice, pleasant and helpful the van which we were picked up in was less than adequate. It was a 15 passenger van, packed with 15 adults. For $150 per person, I expected something a bit more comfortable than a prisoner-style van for an 8 hour tour. Being stuck in the 4th row of a van is less than comfortable. My recommendation is to conduct a self guided tour, you'll save some $$ and won't be lacking in leg room.