So that's the background, why I watch movies like this.
Of course, since it's a musical, a lot of the experience has to do with the music, which is a little old-time (in style, although they're new compositions) and jazzy; I'm not sure how I feel about that. I guess since the storytelling style is kinda alternative, bouncing back and forth in time, that's why they wanted the musical style to seem a little grand.
I was patient with this because I think that something like this is what Anna Kendrick really wants to do, very musical and romantic, and I like the idea too, it's just how it works out, for me, really singing dialogue isn't really the same thing as singing a song with a verse-chorus and everything.
(Edit) Although the melancholy at the end is nice. I guess that's the point of the trick they play with time.