I have been testing the Beta version on a high-spec PC for several months now and find it slow, has compatability problems with the usual downloadable programmes such as Quicktime, Avast, Zone Alarm etc. and has even crashed so comprehensively that it required a complete re-install.
Can find no improvements over XP which would warrant an outlay in excess of �100 to upgrade to it.
Hopefully the final release will be bug-free but considering Microsofts record to date, I won`t be holding my breath