After having seen this movie 3 times in the last two days, I can easily say it's become one of my favorites of all time (imma let you finish...) It's the first Satoshi Kon film I've ever seen and wow if I'm not amazed by the great writing and the wonderful work Kon put into this. I And it's pretty obvious how big of an influence it had on Black Swan.
It's just so damn good and everyone should watch it, especially those who are fast to dismiss anime as nothing more than kid stuff or can't quite get into it.
And being obsessed with music, I've been playing the highlight track, "Virtual Mima", from the film almost all day. It's just too good:
Just watch the film. You'll thank me later.