IF you are new to Myth, this is a wonderful deal, because it is cheap and comes with all the most popular projects right at your fingertips. By today's standards (2002) the graphics are rather dated, but it is still an incredibly addicting and entertaining game.
Granted, part of the material in "Myth II: Worlds" has been freely available for download in the past, but it's getting harder and harder to find. Most of the maps and conversions are professional quality, so I don't object to paying for them. But the price is a bit steep if you have "Myth II: Soulblighter" already.
If you haven't tried the Myth series yet, you really should try "Myth: The Fallen Lords" first. It's a fantastic gaming experience!