Let me get the flaws out of the way first (in no particular order except for the first one)
The Janitor who introduces all the segments is annoying as hell, REALLY bad digital effects (especially the CGI blood in parts of it), Some camera-work feels overdone, moving around too much w/out reason, The Janitor makes really bad, unfunny, annoying jokes, and feels the need to make really bad jokes and laugh like a maniac after each one, and The way that the wish text message is shown when people receive it is okay at first...but gets annoying after a few times
Side note (not a problem or a pro...just there): -The clown in this looks suspiciously like the one from Stephen King's IT
That's all the big flaws
--It does have an interesting enough story, is entertaining, and for those who look into this when getting a movie, it contains a decent amount of nudity.
I would't watch it again by myself (though I don't regret watching it)...i would watch it again with a few friends to have fun pointing out all the dumb things/mistakes and making fun of the movie