I just got home from a tour with Detours on a day trip to the Grand Canyon. It was incredible. Last night I spent over $100 in taxi fare from Chase Field to Scottsdale. Then today I spend $155 on a full day (it is full, be prepared for a full day) to Sedona, Grand Canyon, Najavo Reservation, and some other quick stops for bathroom or stretching. Unbelievable value. Our guide, Memo, was great and he told us a lot about the areas vegetation, wildlife, elevation, and history.
I was looking at other tour companies before deciding on this one and I'm glad that I checked Yelp and TripAdvisor scores to make my decision. Don't be a dolt and pick this one! 3 hours around the park and multiple vantage points... Oh and lunch/water is included! Come onnnn!