Original - Very good but the score and lead performances carry it more than the actual filmmaking does. Robert Mitchum and Bernard Hermann both do some of their most memorable work.
Remake - Cartoonish and embarrassing, but not boring. Scorsese's choices as director are surprisingly hokey. It tries to be more morally complicated than the original and I like that idea but it isn't convincing. But it gave us one of the greatest Simpsons episodes.
One of the few really memorable insights I can credit to Leonard Maltin was his observation that this movie is reminiscent of Wes Craven. Really he just said something like "Cape Fear for the Freddy Kruger generation," but it actually has more in common with his grungy 70s movies.