I've been curious about this film ever since I overheard my peers dub Inception as a clone of it. While Inception's big lie (the PASIV device) might have been inspired by Paprika (which shares a similar, if not identical, lie), these films are hugely different in their content and meaning. To dismiss either as a duplicate of the other is unjustified and frankly, calls into question the viewer that would make such a statement.
This film had the signatures of a typical Satoshi Kon work in its style and themes (see Tony Zhou's analysis). Most notable was its treatment of reality and the imaginary.
/ in progress