Actually, I don't even watch the Youtube videos of MM because I don't want to see anything yet. I want to experience it all, one day if I can in the future. It's not even from the Youtube videos that I've heard great things about. Anyone I know or have seen online on blog posts and Disney sites have said nothing of positive and great things about the attraction. The perfect example is
http://www.disneytouristblog.com/mystic-manor-hong-kong-disneyland/ He has a great review of the attraction and I don't even read or look at the ride pictures itself! Also, Mystic Manor is much less closer to HM, than FOP is to Soarin. Mystic and the Mansion do share the same kind of idea and premise (kind of) but besides that, they are two completely different rides with totally DIFFERENT stories and much different ride systems as well. (Ominover Dark ride, and Trackless LP dark ride. Whereas, Flight Of Passage is pretty much a screen based simulator just like Soarin. A few differences with the queues, and effects, but overall same idea. Last, I actually have heard that Ratatouille is the worst out of the 3. Relying too much on screens and not as many physical sets. So yea, that's my spiel haha.