Having bought the bundle yesterday, I've been installing and trying some of the programs. So far, I'm very impressed with the MAGIX Video Sound Cleaning Lab. I tried it out on an extremely low-quality copy of a public domain movie from the 1940s, and it was able to drastically improve the audio with a few minutes' worth of tweaks. It could be very useful for fanediting older movies.
The MAGIX Vintage Effects Suite (which is a plugin for Vegas) also seems intriguing. Although I haven't had a chance to test it out yet, it can apparently make digitally-recorded audio sound as though it was recorded on analog equipment. It might be useful for fanedits that make a new movie seem old or blend footage from old and new movies.