I've had Verizon service for 4-5 years and in my area--greater NY city/NJ/CT it's been superb, with accurate coverage maps and general good customer support, especially compared to ATT, my prior carrier.
I have the Motorola 710, since I wanted Bluetooth capability, and while the phone has some annoying aspects to it, it's not bad at all. With the extended battery I can run two days without a charge--I have a 3000 minute plan for work--and the phone is actually a little feature rich and some things like the camera are tricked out by Verizon to be a little less than optimal. The phone does get a premium price, however.
Prior to that I had the Moto 270c, a nice phone that had some physical flaws, like the headset jack, but they don't handle that phone any more.
Best bet: check out Howardforums.com, sort of the Bladeforums of cell stuff!