Full Disclosure, I never actively watched this, and it's not one of the TV shows that my wife watched and I occasionally pay attention to while I sit in my chair and read.
And I am at that age where it's really hard to see Anthony Michael Hall as an adult.
That being said, we never turned it off when we caught it. And when we come across it now we will still watch it.
Because, WOW. For a King adaptation, I haven't seen a bad episode. And despite Anthony Michael Hall being an adult, he is a really good actor.
Even without actively watching it, I have seen enough to come to the conclusion that it is quality all around. It's not so King as the book, but, it is exactly what it should be for a series based on a single novel.
But it is really Hall that entices, he nails the part, he conveys an almost depressive anxiety that is almost hard to watch, and he does it consistently. Doing that role for 5 years must have been hard, but every episode we saw he seemed perfect in it.