I love it. I wish it would have gotten a larger budget, but I see why it got the one it did and I think it gets too much undeserved criticism.
One of my only complaints about WDW is that usually attractions/entertainment are typically built for girls or built to be gender-neutral. There's not a ton of things that are designed specifically for boys in mind. Fantasyland, for instance, has attractions that are either built exclusively for girls (the entire New Fantasyland minus 7DMT, princess meet and greets, etc.) or are gender-neutral (7DMT, peter pan, etc.).
I'm not saying that girls don't enjoy this attraction, but Stitch is great because it is built to appeal specifically to boys and it's one of the very few things at WDW to do so. I love that there is an immature, goofy attraction in the park that specifically appeals to guys and doesn't try to really target girls. Plus, it's a great attraction for dad and son to do while mom and daughter go to ariel or something.