I currently have Sprint PCS service. I like it, I like it a lot!
Basically because it has nationwide long distance so I could keep my local number in PA (for my parents to call to call me locally) when I was in school in FL.
I haven't had any problems with service too much and the minutes are pretty good. You just have to catch them during a special to get the best minutes.
It also depends on which Sprint phone you get. I have a Sanyo 4400 (or something like that...the one with the speaker phone
) and it works fine for me and the speakerphone comes in handy in the car! But my sister and a couple of friends have that grey Samsung flip phone, and they are always losing service with it and having low battery life.
I don't know too much about the other services but I would like to hear about them.