Hi,
There a quite a few combustion 3.0 licenses on MAC.
Like any software it is not perfect but there are satisfied customers using it. When things are going fine for a user, generally they don't say anything but when things do go wrong they come to the forums for advice.
Issues regarding combustion 3.0 can be related to anything from hardware issue to administration issues for OS X.
We are investigating bugs all the time and trying to resolve them as soon as possible.
I would like to suggest that you download a copy of combustion 3.0 on Mac from our website at http://www.discreet.com and try it for yourself.
Best of Luck.
Regards
Grant
DISCREET EMEA