After having a 5800xm, which I was very happy with, I upgraded to the X6 (through o2). The back cover is a thin, flimsy piece of plastic. On the right is a lock/unlock toggle switch that feels like it is going to fall of, and rattles! I've only had the phone 2 months, and one of the external speakers has decided it wants to crackle and sounds very distorted. No support for some of the really good apps I could use on my 5800 (iplayer being 1 I miss most). Capacitive touchscreen is good, and works well, not upto iPhone standards, but an improvement on the 5800's resistive screen. Real shame, as it is such a nice looking device. Not much better than the cheaper 5800, and no way near as well built as a 5800!