sometimes you find a movie in Redbox that never made the theater (or at least you never noticed when it did) and you take it home and take a chance... and it turns out to be a great movie!!
this is not one of those times.
It Follows starts out with a really interesting and creepy premise. there is this THING that follows people around and kills them. It can assume different forms. it walks very slowly, and finally just wears you down until you give up and die.
but it falls apart very quickly. the characters are one dimensional and make stupid decisions that make you stop caring very quickly. and it has a "gotcha" ending.