For one, its kind of saddening to me that this went down as "Amy's best/most popular song" because I personally feel like she has a boat load worth of better tracks. I also dislike the fact that it got so big because people used it as a way to mock Amy while she was alive and as a way to mock her passing (for example headlines like "She should've said "Yes, Yes, Yes") and a string of other horrible jokes and spins on the songs lyrics.
Secondly, Am I the only one who doesn't really like the final version as much as the demo version?
I really loved the personal, confessional-esque feel of the original version, to me it was the song in its rawest, most heartfelt state, unlike the final version with the organ track and majority of the emphasis revolving around the chorus (thanks to mark ronson). I love the verses and the bridge of the most, for me, those are truly the best moments of the song.
Anyways, just my opinion on that one track, don't kill me, I still love Amy (She's one of my favorite artist) lol feel free to share your thoughts too, I want to discuss.