This is a great concept and works well if you're flying out of terminal 3 or 4. If you're flying out of 2 this is such a pain! The train does not have a terminal 2 stop but the shuttles will not take you to the east economy lot from T2 so you have to take a shuttle to terminal 4 then catch the train from there. Sounds easy unless you're dragging luggage up and down stairs like I was. Took me 45 min to get to my car after the plane landed. I'm hoping the phoenix city council is working to fix this problem. Use Blue Sky if you're using terminal 2. Way easier!