I can't comment on MMSD2005, but I did buy MMSD2004 and found it to be okay, it is like getting Samplitude "Lite", my only real beef with 2004 deluxe was that while they touted the "new" 24 bit support both on the website and on the box, the program could only access your soundcard at 16 bit, so you could import 24 bit audio files, but you could only hear them at 16 bit, and you could not record audio at 24 bit, strictly 16 bit recording/playback, there was no warning ANYWHERE as to this intentional limitation of the software, I fully expected true 24 bit ability.
When I inquired to Magix support about this issue, I was told that if I wanted to record/playback at 24 bit I should buy Samplitude.