I thought it was pretty fun!
In the game you can control either abe or Munch and you guide them through worlds with danger around almost every corner. The beautiful levels have some odd puzzle elements to figure out; some as are very simple, others are difficult to the point of being frustrating.
The story is engaging and funny and should keep most gamers interested, but the frustration of dying over and over again while trying to figure out what to do might deter some. If you've got the patience to figure out what to do and how to do it, Munch's Oddysee is a solid title that is sure to be a welcome addition to your collection.
The fact that the game has a few different endings makes it a good candidate for replay, but the length of the levels and it's one-player only format might deter you from playing it if you have to share a tv with others because it is not nearly as fun to watch as it is to play. This might mean that you'll want to beat it a second time sometime later down the road.