I just got back from it as well, and though I agree, it did feel like Insidious and Signs in a blender, it still was pretty effective... The last 10 minutes or so had me pretty freaked.
I do have to point out though, the cinematography and the sound design was absolutely fantastic. An audio and visual feast. Some moments were really predictable, but they still had some good pay off, no cheap scares either.
Go see it!