The Tobe Hooper movie is ... well, let's just put it this way: one of my favorite King novels is From a Buick 8, and I dearly hope Tobe Hooper's adaptation of it never happens. He made some good movies early in his career, but by the time The Mangler rolled around, those days were over.
I will admit to enjoying Ted Levine in The Mangler, marble-mouthed though he may be. I also thought Robert Englund gave a couple of good performances in it ... although the characters he played were so poorly written and badly directed that all his labors were for nothing in the end.
As for the "sequels," well, they're about as bad as movies get.
"The Mangler 2" has Lance Henriksen, slumming it in a small role; he's always fun to watch, but it makes me sad that an actor as talented as him is so poorly considered by Hollywood that he has to take roles like this one. Other than Henriksen, there is little reason to ever watch "The Mangler 2," which is so unrelated to the original King story that it makes The Lawnmower Man look like a word-for-word translation.
Ditto "The Mangler Reborn," which is one of the worst movies I've ever seen. Literally no redeeming qualities at all.