I have been using this for the last two years, I am quite impressed with it. Firstly, its a great design. Screen is too good to be true, the keypad is excellent and the OS is quite stable. It is not a smart phone, but u do get lot of apps. It has almost all the features that you would need in a non-smart phone! The camera quality is very good for landscapes(realised it when we went to Leh and our cameras battery gave up!).
Call quality is decent, though I get electronic noise(static) when I plug in a noise-isolating earphone. The same goes for radio. I think the latest music phones might fare better in this regard. Being a metallic case, it does heat up a bit on prolonged use and the battery life isnt that great, but for its size, its definitely superb.