Just watched Friday the Thirteenth, so here's my assessment, as promised:
Of the "Big Three" of 1970s-80s horror cinema - Nightmare on Elm Street, Halloween and Friday the Thirteenth - Friday is the weakest in every way. Out of Laurie, Nancy and Alice, Alice is the worst Final Girl, especially when she fails to notice anything strange until 20 minutes from the end. Out of Craven, Carpenter and Cunningham, Cunningham's direction is poorest.
Two things redeemed it: Mrs. Vorhees was bloody scary, between Mrs. Loomis in Scream 2, and Mrs. Bates in Psycho. And also, I can honestly say I flinched during most of the death scenes, especially Annie (throat slashing is the one form of death that I can never stand to watch, especially after Witness), Jack (the arrow through the throat) and Mrs. Vorhees (despite the impossibility of her hands reaching for where her head should be). Even Alice being pulled under at the end was kind of scary even though I knew it was coming.
Overall, not as bad as I expected but not as good as most of the ones I've seen.