In my opinion, no. It's a game with a loving attention to detail, particularly so if you're a fan of the series. However, the main quest will probably take you anywhere between 8-10 hours with some side content splashed in. You might extend it another 3 or 4 hours if you get all the collectables and do all the side quests.The game play isn't challenging, but it is fun and amusing. The presentation - the visuals, voice acting, humor - are great. It really does play out like a really long episode of South Park.
Still, $60 bucks for a 10 hour of game just isn't enough value for me. It's more like a $40 game.