I'm not talking about quality. As a guide to various kinds of horror in D&D, VRGtR is a good supplement. What it isn't, and what it doesn't allow you to do, however, is adventure in the Ravenloft setting as it was envisioned and presented at any point in its decades-long history prior to the publication of VRGtR. It is a different place that uses a lot of the same proper nouns for no good reason (I don't consider, "people will pay us" as a good reason. As a horror supplement, its a great and worthy addition to 5e. As a Ravenloft setting book, I find it awful and deeply regret spending money on it.