If you liked/like South Park this is worth playing, it really is just like playing an episode of the tv show.
The comedy/South Park flavor is good, a lot of it taken straight from the show.
The RPG parts are a bit light for my tastes, very easy, and stats/leveling up/equipment didn't seem to matter very much.
Combat was very uneven, it felt hard at the start, but once you get the hang of it, it's very easy, not very strategic.
This game has a lot more in common with Costume Quest than Dragon Age
I enjoyed it very much and I'd probably play a sequel.