Honestly, sometimes it's too much. The graphic novel can be gratuitous. King's novel has horrific moments, but a lot of the terror is in the atmosphere and the slow burn. The comic, by nature, has to deliver a visual punch on almost every page to keep readers engaged. This can lead to monster-fatigue, where Pennywise loses his impact because he's on display so often.
The most effective scares for me were the quiet, psychological ones they managed to translate visually—like the photograph that seems to change, or Bill seeing his dead brother in a crowd. Those moments use the comic's strength of static imagery to create a deep, lingering chill.