Pros: Style, Style, and Style! Unique design that you will either love or hate (most will probably fall into the former). Solid build quality.
Cons: Unless you buy a case, screen will be easily scratched/damaged. Sound volume on the low side. Battery life stinks.
Summary: The main selling point of the Samsung T629 is its style. Very few phones on the market right now can compare to this look. It IS a head-turner. In the end though, people will keep a phone for performance and I'm not sure if the Samsung 629 will win many longtime fans. I had T-Mobile send two units one after another, but they still ended up with the similar problem of low sound volume, even with the level turned all the way up. My old trusty Motorola V557 blew this Samsung unit out of the water when compared for sound volume and reception. When the Samsung is locked onto a good signal, clarity can be stunning, but the T-Mobile coverage sometimes leaves a lot to be desired. Dropped calls also seem to have increased since I switched from Cingular/AT&T. You know those ads from AT&T touting "More Bars In More Places"? It's TRUE! In the end, I am still returning both Samsung 629's because of low sound volume. I also prefer a flip design even though I was intrigued by the slider design. The flip design will prove to be practical in the long run by protecting the screen from scratches. Battery life is also a shortfall here. Even with moderate use (1 to 1.5 hours a day), you will find yourself reaching for the charger at least once every 2 days. If you're not a fan of charging cells on a daily basis (and I definitely am NOT), I suggest you stay away from this phone. If you start using this for text msg / mp3 / camera / video, you will definitely be reaching for the charger on a daily basis. The T-Mobile rep admitted the Samsung's big screen sucks up a lot of battery life. I am going back to a Motorola (but NOT a Razr!) where I had better overall experience.