I've had T Mobile for many years and have never had anything to complain about.

I've also been really happy with my Android (Samsung Vibrant) for the past year and a half, although it has been slowing down and messing up a bit lately (like it knows it's on the way out). Angie has an iPhone 4 through her work and it's cool but I'm not entirely sold on iOS.

I've been reading so many head-to-head reviews today, my head is spinning.