I give it a 9/10. Its weird and freaky and very much communicates a solid and fascinating tone. It also shows off some remarkably good production values, both in the "special effects" sense and the "cinematography and set design" sense. Plus, I like Wanda and I like Olsen as Wanda, more of her is always good.
I mark off one point for being a trailer, and thus intrinsically untrustworthy and incomplete. It could have earned an extra credit point if it had some Darcy, but no Darcy, no bonus point. *cough*