ME's file managing system is a pain - you constantly have to re-access files rather than having them on view all the time.
That is the default behavior, but it is easily changed to the old way.
I have been testing ME with specific software we need to run and it has proven extremely stable with THAT software. Haven't tested anything else beyond IE and Outlook and that specific application .. point being, the system can be stable. The real issue is how your applications and drivers react to the change.