I like stitch himself, and I like the movies and tv show.
As for in the parks... I just don't see a need for it to have lasted this long. It was a probably a good idea for the new ride (seeing as it ties directly into the ride), but now that the ride is open and running... they need to stop that.
(Although, i will admit, i laughed when I was in the restroom and the music was interrupted by stitch).
As for the "ride"... the chili breath is awful, and while my daughter loved it, the rest of us were very bored and uninterested. Not sure the exact reason. It was just... blah.
(maybe, for me at least, it is because I remember Alien Encounter).