Pros: bus was comfortable, driver (Lorraina) was knowledgeable but didn't over talk, the automated history lesson on the bus was great, we watched 3 movies to kill the time which was nice, we kept to a tight schedule and got home 1 hour early.
Cons: we chose the south rim, which was 2 hours further than the west. We debated upgrading to the pink jeep tour, but didn't.
Advice: Be smart(er) about your choices. If we had to do it over we would either do the west rim or south and upgrade to the pink jeep tour to get the guided tour
Overall it was a great experience and worth the 90.00/pp paid.