Being the WinXP whore I am, I think it's a most excellent OS...
dunno about upgrading from a previous OS... havn't tried that,
I've always done a
format C
when reinstalling...
...havn't had any program incompatibilities (

nasty word!) so
far, at least none which couldn't be easily solved.
And fortunately it's possible to get rid of the WinXP ''plastic
look'' very easy... I found it cool and stuff when I just got
WinXP... now I hate it... and use a Windows Classic scheme.
WinXP ownz me...

.