From the beginning of this season of South Park, it's plain this is the sharpest and most creative of the early seasons. Compared to the first two seasons of the show, season three is more creative in its humor.
For example, on the first disc there's a meteor shower going on in South Park. The first disc goes through the same night of the meteor shower from different perspectives. As such, the disc benefits greatly from the DVD format - you can appreciate the cleverness of multi-part episodes much more easily.
The setup and menus are crisp, clean and to the point. There are no previews, and a fast load to the menu screen lets you "Play All" as the default option. This season also takes some excellent satire and pushes it to the extreme, this season is in my opinion where South Park's humor truly crystallizes.
Definitely a hilarious must-buy for any fan of the show.