Working with Creo 2 M120 we had some problems with EMX 7.0 (Expert mouldbase
extension) and EMX 8.0 in that some of the EMX functionality did not work
reliably. We switched back to M110 and all the problems disappeared and it
is very stable, so there is perhaps something about M120, however M120 on
its own seemed fine.
As a small company we just don't have time to evaluate what has been
improved in a later build (In fact I wouldn't even know where to look for
that info) and that is where the forum is very useful in that you can hear
which builds to avoid.
Steve