I’ve seen a few of the movie adaptions of his books and liked them. Silver Bullet comes to mind.
The first actual King novel I tried to read was Cell. Fascinating premise.
IMO the sentence structure, vocabulary, is eighth grade.
If that’s his usual writing, forget it. I couldn’t get past chapter 2. Might not have been that far.
IMHO, over the course of decades, he's continued trying to reach the lowest common denominator to sell books. As the American public has become decreasingly literate, King has continued to try to sell books (and screen plays) by writing to the bread, circuses and shiny object crowd.
As much as I dislike his politics, he's certainly a capable story teller, and I think any aspiring writer would do well to read his On Writing, in which he openly admits to writing "schlock" to pay his bills, and indulging his more serious pursuits elsewhere, often under pseudonym.
It will be interesting to see how history regards him. Much of his horror is immediate and strikes a chord by taking a common place object, device or situation and making it dangerous (i.e. "Cell", "Christine," "Cujo" etc.) When those objects or situations grow obsolete, the horror will most likely lose its effect. On the other hand, I think his Dark Tower books will have a lot of staying power...JMHO
After several days of agonizing reading, I managed to get through King’s “Tommyknockers”. Reading it was sheer torture.