I have been a Blackberry user for years, and a 7290 user for the last 6 months or so. I just switched to the 7100g from Cingular and it is awesome.
Phone quality is great, screen is excellent and the typing is fine. I adjusted to the suretype in a day or two. Its nice to have a device that resembles a phone so I don't feel like I'm talking to a calculator.
I recommend it !!