I had a D500 and it was dead within a few months. From the first month I got it the screen was nackered, when I slid it down it would just all go green and freeze. A few weeks later it fell out of my pocket when I was riding and the plastic snaped, but it mended the screen problem. Then a month or two later it fell out my pocket again and the screen smashed, the case split open and it just got destroyed. They are quite nice phones with some decent functions but are a bit too big and breakable. My sister has the D600 which feels plasticy and crap, when you slide it up it just grinds against the other half of the plastic.