This review is simple...
Unity + Adventure Creator is the true realization of democratized game development and the best asset store purchase I've made.
Want to make a game with literally no programming (in pretty much any style of Adventure Game)? No problem. Want to implement some custom systems with Playmaker... easy (and new actions are coming soon).
Adventure Creator is updated constantly (and intelligently) by a lovely chap who has actually designed adventure games (wish that last phrase could be emboldened). He also graciously listens to my nagging suggestions and questions.
I've worked with Adventure Creator nearly every day since purchasing it 4 months ago and can recommend it without any reservations... not only for what it is today, but for what it will undoubtedly become.