Our guide, Dustin, did a great job relating to the people in our group. He had kids who asked him a million times, "What is this rock?", college age girls who wanted to go off and do their own adventuring, and then a near-retired couple who moved slowly. He was very patient with all of us!
I wish that more time could have been spent at the South Rim of the Grand Canyon instead of taking 30 minutes to travel outside the park to eat at Cameron, 30 minutes back from Cameron to the Grand Canyon and then 1 hour to shop in Cameron at the Navajo shop.
The company was good at communicating with me that Dustin would be late picking us up due to road construction and traffic.