Stupidly, I was taken in by the claims for Fusion 7 of
Even Better Performance
However, my VM was rendered unusable as the video performance was terrible. Ran Windows Experience and it proved a halving of video perf.
I am fed up of buying products that don't work, or worse, make false claims.
I have now spent considerable time restoring 6.0.5, which works fine. Thank God for professional software such as Mac OS X, so a restore of application and all the stuff that accompanies it was possible.
If you too are in this position, join this list.
And, no, it's not Apple's fault. 6.0.5 under Yosemite worked absolutely fine.