I liked almost all of this story, but the oblique Pooh references really bugged me. They should've either been more direct or more subtle. If they weren't direct for copyright reasons, as suggested, well then maybe you shouldn't write a story so clearly based on a copyrighted character. The story would've been the same without the Pooh references. For me it got especially annoying near the end when he started hallucinating about his 100 Acre Wood friends, which served no purpose for me except to just cram a few extra references in the last bit. It struck me in the same way that much of X-Men 3 struck me--there are a LOT of characters from the comic in X-Men 3, but most of them are only on-screen long enough to be introduced, and if they're lucky they get one speaking line. So instead of using them as part of the story, like in the first two movies, it was just a "Let's see how many campy references we can cram into 2 hours, it won't be irritating at all, I promise!" Yeah, this was like that for me.
I liked the quest, I liked the slow reveal. I liked Edward's thought process. I was sad that he died, though by that time I was annoyed enough by the oblique Pooh references that I wasn't as sad as I would've been.
I've been fond of Winnie the Pooh since I was a kid. I watched the Disney version a lot, and also watched the cartoon on Saturday mornings. I'm not sure I've ever read the books, but I definitely want to.
A bit of trivia for you: Did you know that the voice of Eeyore in the cartoon show and movies is also the voice of Optimus Prime in Transformers (both the 80s cartoon series and the Michael Bay film). Peter Cullen, I believe his name is, and his IMDB list has dozens of 80s cartoon cameos for voice acting. I'd been big fans of both Eeyore and Optimus for nigh on 20 years before I realized that!