This shuttle was a lifesaver. I wish I knew it existed hours before when I was in somewhat of a bind, but I'm glad I finally learned about it and was able to book immediately. They took me from Phoenix to Flagstaff for 45 bucks and in about two hours flat. Not bad! My experience was fine - the shuttle was running late though, which was a little nerve wracking since I was at a kind of sketchy bus stop by myself for about an hour. But they did indeed finally pick me up and I got to Flag safely.
The shuttle is essentially a 12 passenger van with a trailer attached. Definitely go-to transportation for NAU students. I fell asleep, woke up, and was in Flagstaff... cold, confused, now searching for late night Ubers, but at least in the right city. The experience was overall pretty pleasant and I would definitely recommend it for students or travelers, especially those flying through PHX. I actually saved money by taking the shuttle and renting a car in Flag instead of in Phoenix, despite the cost of the ride. Who knew?
Definitely make this your option if you need a ride in AZ.