Its tricky really, I generally only read the horror/thriller genre and I would class Laymons as mediocre.
He has a penchant for sexual violence in most of his books and I do mean nearly every one. Sometimes his writing/plots are good, he likes the borderland between outright supernatural horror and strange human mutants. Funland is ok, if memory serves, no twists or surprises but a gore fest nonetheless. I say give it a go and see what you think, although avoid the beast house series like the proverbial plague.