As I mentioned when you showed this to me before, I think the concept is amazing and I honestly love the idea behind it.
In a sense I'm glad you guys decided to keep it relatively simple, trying to follow two screens at once is already borderline visual overload, but it really makes for an interesting sequence. You guys followed a nice pattern/structure and the sync was top notch.
My only complaint would be that it is initially hard to follow. I didn't quite seem to get what was going on, and to be honest was more focused on how you guys were editing it. However, for me that's the real appeal behind this AMV, in that I could maintain a good level of interest merely from editing technique alone. It also allows for multiple re watches to really appreciate it and get the visuals stuck into your head.
I can't wait for people to begin refining this technique more.
4/5 Great job, you're fast becoming one of my favorite editors
P.S. If I were never told that 2 people edited this I would have honestly thought that it was made by 1 person.