Pros: Solid construction
Cons: No built in text messaging
I had one of these things for about 4 years. The most annoying misfeature was the lack of a SMS client in the phone itself -- it's all web-based. So if you want to send or read any text message, you have to do it through the browser.
It was solid enough -- it held up to years in my pocket -- but the antenna eventually broke off at the base. The phone got decent enough reception without it anyway.
I eventually ditched it, only because I opted for a cheaper rate plan with a non-CDMA provider.