cell phones...

Hey, y'all...since LJ is a mine of people with information, I'm going to shamelessly use it.
I have a cell phone, a pay-as-you-go type thing, because I never used to use it much. However, I'm actually beginning to use the thing now, & I'm thinking that pay-as-you-go isn't working too efficiently anymore. I'm starting to do research, but there's tons of stuff out there. So my questions are these, of course--
What service do you use? What plan? Does it work well--& how often/for what do you use your phone? Any drawbacks? &ct, as it goes.

Thanks so much! Anyone who helps gets...oh, I don't know. Virtual brownies or something. :)