I still love these books. They're still pretty spooky, because the stories are archetypal. Some things are always scary. For the target audience, this will likely be their first exposure to most of these archetypes. And nostalgia helps those of us who read these years ago. The stories are nice and short, perfect for telling around a campfire or at a sleepover.
The original art by Stephen Gammell is horrible and I love it. I always did. It was a pleasure to be horrified by it. The newest edition has replaced the art with art by Brett Helquist, which is creepy but not nearly as nightmare inducing as the original. Sigh.