I have been on a lot of light rails before and this one is favorite one. You can go from Phoenix to mesa, in a couple of hours. It is pretty new and the city does a great job at keeping it clean. I like taking the light rail to Tempe; it is just a 45 minute ride from downtown Phoenix. It is nice that they have bike racks, and is accessible for handicap people on the rail. I'm excited that they are going to extended it to north Phoenix and Scottsdale.
You can ride 1 time for $2.00 or just do an all-day pass for $4.00. Either way it is a great deal. They even have a monthly pass for $64.00 and you can ride the busses with the monthly pass. While if you are looking for a ride and don't really feel like paying for a taxes. You should take the light rail.