Being a big history buff and new to Phoenix, I went on this tour. I found it very informative and made Phoenix seem a lot more interesting than I initially thought. It's true, you don't see inside of buildings but getting the creepy lowdown on downtown buildings was a lot of fun in and of itself. The tour could be improved if somehow could go inside and get a feel for the area.
Even my kids, age 8 and 11 were intrigued and stayed interested throughout the tour.