When considering a new phone I wanted it to be as thin as possible. I didn't really care about the features, I just wanted it thin and light. The t519 fits those requirements perfectly.It does a great job with the core features that are expected on a phone these days. Nothing too fancy, but all the basics in a really great thin packaged that is reasonably priced. I carry my phone in my front pocket or in the inside pocket of a jacket. That's why I love this thin phone so much. If you just love the Josey Wales cell phone slinger look, why bother with this phone? Don't be a dork with a phone on your hip cowboy, get this phone and slip it in your pocket or purse.Call quality is pretty darn good and there is a good range of volume adjustment on the ear piece which I really like.I'm not a cell phone power user so the battery life seems great to me.The camera says it's 1.3Mega Pixels but who cares, the lens is not that great so the pictures are, well, what you'd expect from a phone. Not great, not horrible. The display however is quite nice, except in the sun of course. Sure the keys are small and some reviewers do not like the 4 position rocker switch due to its small size. I think it works just fine for normal opposable thumbs.The speaker phone is quite nice and the ability to enhance the onboard memory with a microSD card is really great. The phone plays music but you'll need an optional adapter to listen in stereo. It's no iPod but having some songs to tide you over in a pinch is cool.The menus are much improved from the 2yr old Samsung I upgraded to, yet they are familiar and clear. You can do things like multi-select making the chore of deleting a bunch of things all at once easier.Basically this is what I expect from a $100 phone (price after rebates) but the thin size has exceeded my expectations. It's so nice to not feel or see the phone in my pocket. T-mobile has great customer service and has been my favorite cell carrier so far, and I've tried them all.