I made a trip to Japan in November just to visit this before it closed down. It was pretty neat, but to everyone now terribly disappointed that they missed it: it was not as amazing as you hoped. Some of the interior architecture was I believe a very faithful reconstruction, but most of it can be approximated by walking around Mong Kok at night. A great deal of space was dedicated to arcade machines and there were some strange sci-fi elements that, in my opinion, detracted from the experience.