The movie is presented in the form of a play, with sets transitioning cleverly before your eyes and a score playing almost entirely constantly. Instead of using cutscenes, walls and buildings move, the sky changes color, and things are brought in and out of focus -- this was all obviously thought out extremely carefully. The characters are easy to identify with, and the sets are quirky and cute. The singing can get a little old at times, but it sort of helps bring in the dreary effect...fitting for a movie about abandonment.
I bought this as a blind buy during a sale and couldn't be happier.
BluRay PQ is great, there are some scenes that are really soft but that is the exception. I watched this on my 60" HDTV and there was phenomenal detail throughout the film.
Audio track isn't anything too ambitious, but sounded okay on my system. No pops, hisses, etc., as with basically all Criterion releases.