I liked it,the contrast between the ugly,grimy real world and the colorful internal one was an interesting touch (I tend to notice those kinds of useless details) I liked the animation,how gooey and jiggly everything was,but the ending was a little dissapointing...(not sure if this is a spoiler or not :P)

If drix is only a 12-hour tablet,why is he still around? I thought it would have added more depth to the story if he was to disintegrate after his cycle (it would have made more sense...I get the feeling it may have been originally planned that way at some point)