Whilst this part pack does not contribute anything to the game, it is amazingly good fun. I do not have this on my full version of Spore, but I used to have it on my Creature Creator, a game which without Cute & Creepy, would have been quite dull. I has plenty of fun parts, which I find are more detailed and better quality than the ones which come with Spore and Creature Creator. I particularly love the new patterns for the creatures that the Cute & Creepy parts pack adds. This pack helps to make your creatures much more individual and expressive.
In addition to this, the test drive mode is made much more interesting by the ability to make your creature dance, sing, toss flowers, be electrocuted and many more.
All in all, I love this parts pack, and would encourage anyone with Spore or Spore Creature Creator to get it as soon as possible!