Good: camera, Sony Ericsson menu / system, compact device, brighter screen, glass screen, pretty fast
Neutral: something hard keys with low contrast (white model), only M2 card as storage
Bad: the flash can not manually (fill) are activated, but only when it is dark enough
unsigned Java applications always ask for the internet (Option "always yes / no questions" can not be set)
in the modern Sony Ericsson mobile phones is not the case (Elm, Hazel, Zylo, Cedar tested)
Charging socket on the bottom side without cover, you may quickly oxidized by skin perspiration / dirty
How long does the loading port until it finds no more contact (I had some SE phones by approximately 1-2 years) remains to be seen - has been fixed at the last models with USB port yes. Tip: do not buy in white, in low light conditions, the keyboard lighting is exactly as bright as the key and you see nothing.
Much more compact and better serve as the K850 (keyword Sensor buttons on the screen).