This movie was marketed wrong. It is fun and funny and more of an adventure. There isn't really anything wrong with it and lots right. It sucks they tried to sell it as horror. Its like a Ghostbusters not like a SAW or whatever.
The ninja action is really fun and looks amazing. The normal talking scenes aren't. This movie feels like it was made by 2 separate crews. Ninja scenes are stylized and amazing. When it starts to look good you can tell ninja are coming. It should feel like they are always lurking but nope. Just people talking in an office.