Mine faded quite a bit. They told you the longer you'd leave the dye on before the first wash, the darker it would penetrate. Well, they must have really weak dye, because I left mine in for over a week (wrapped with the rubber bands and wrapped tightly in plastic), but when I washed it, it was still quite faded.
It still looked okay. Typical homemade tie-dye. They do show you how to do the mickey head though (If you want).