I have had my Nokia 5700 for 3 weeks and I have very few complaints. The design itself is very unique and the twist feature lends a creative approach to opening your phones different modes quickly and with an extra flair. The joystick is a little hard to maneuver when in video/pic mode although you do get used to it.
The resolution is AMAZING as is the sound. It takes great pictures in daylight, night-time images tend to get fuzzy and dark with a little bit of a green tinge even in flash and night mode.Beyond those aspects, I do run into some glitches where the phone will automatically restart on its own or freeze.
I am looking into the cause of this issue, however otherwise it is terrific. This phone is VERY durable and tough. I think it could withstand many falls without internal or external damages (although I would still recommend you take good care of your headset!)