Entertaining stuff with some pretty good scares. Those of us who watch horrors regularly will easily be able identify "inspirations". There's a bit of Child's Play, Paranormal Activity, The Exorcist, Birds to name a few.
Remember that time when you turned around suddenly, and caught your reflection in the mirror? Normal people experience a moment of heart-stopping terror at such times. And this is the kind of people that The Conjuring aims at entertaining (read "give mini-heart-attacks to"). The rest of the audience spends the time looking for and successfully pointing out the tropes that are replete in this evil-witch-meets-scary-looking-doll-and-they-both-scare-people-happiy-ever-after venture.
The stage has been set. Ed Warren (Patrick Wilson) and Lorraine Warren (Vera Farmiga) are a husband-....