If you enjoy South Park, you will enjoy the game. Lots of great character references, the odd jab and joke here n there that catches you off guard. Its enjoyable.
As far as gameplay goes its really like stick of truth 1.5. Running around the town, solving puzzles etc is all the same as the first game, except you have different buddy powers now. The combat is changed up enough to feel like a new game without going too far away from the formula of the first game.
If you enjoyed stick of truth or south park in general you will enjoy this game.