Well I've owned this for long time now, for me so far so good. 
I've written few reviews about 5800XM and its uses u can check it on my blog :
Nokia 5800XM review:
http://buddhikamh.blogspot.com/2009/09/longrun-user-review-for-nokia-5800.html
For people saying its touch screen isnt sensitive (also read the v40 software update review below):
http://buddhikamh.blogspot.com/2009/11/use-your-resistive-type-touchscreen.html
V40 Firmware update review :
http://buddhikamh.blogspot.com/2010/01/firmware-update-v40for-nokia-5800xm.html
check it and see, ask if u got any prob, will try to help.

I've written few reviews about 5800XM and its uses u can check it on my blog :
Nokia 5800XM review:
http://buddhikamh.blogspot.com/2009/09/longrun-user-review-for-nokia-5800.html
For people saying its touch screen isnt sensitive (also read the v40 software update review below):
http://buddhikamh.blogspot.com/2009/11/use-your-resistive-type-touchscreen.html
V40 Firmware update review :
http://buddhikamh.blogspot.com/2010/01/firmware-update-v40for-nokia-5800xm.html
check it and see, ask if u got any prob, will try to help.

