Thanks for the review, Goofnut.
I rented this on Vudu HDX a few weeks back so I can't comment on the BD PQ/AQ but I thought it was a pretty decent little thriller. Not really a movie you need to watch more than once but I was entertained throughout the movie. It's one of the better movies M. Night is associated with, IMHO, if that means anything....
I think you can get this at Redbox now (not sure if they have BD and DVD or just DVD for this title) and it's definitely worth a $1.50 rental fee.