I guess I'll be different. We were there Friday night of the passholder preview and we went in with VERY low expectations because of the reviews I'd read so far. If you look at it from the point of view of the target audience (5-14 or so I would surmise) it is fun and cute. NONE of the children we saw in there were scared in the least.
Now, to break it down section by section, we thought the pre-show was AWFUL! Boring, too long, seemed like it was only there to distract you from the wait, pointless, etc.
But once inside it was okay (again in a juvenile, smelly sort of way) Stitch is a cute character they are trying to capitalize on and kids adore him.
They did ask us our opinions on the attraction and we told them we thought they should pipe in air freshener between seatings because when we got in there you could already smell the stench therefore you could already guess what would happen.
I don't think this is one we would wait in line for but if a fast pass is available making it a quick trip, we would go on it (once our children are old enough).
I guess the fact that we aren't willing to wait in line for it does speak some to its lasting ability though. It did kind of have the feel of a once is enough attraction, not something I think they were hoping for. But that is an adult point of view because most of the kids we saw were begging to go again.