I think Vanden Plas got better and better with each release with the exception of Seraphic Clockwork. I thought Christ 0 was slightly better. In fact, I think "Silently" might be the greatest metal song ever written, so obviously I am a fanboy. Having said that, though it took a while to "get," Netherworld Part I is their masterpiece in my ear. This new one seems more "immediate" though.
I find Vanden Plas incredible in a way few others are....... Vanden Plas has a signature sound. They ALWAYS sound like Vanden Plas, yet EVERY song is also unique and doesn't sound like any other. We all have our favorite bands and my taste isn't necessarily any better than anyone else's, but I personally feel like Vanden Plas is in a class by themselves when it comes to progressive metal. It isn't necessarily that they are "better" than band "x" but rather that they arrive at their "progness" in a different way than others. As opposed to odd time signatures and uncommon chord/note patterns, Vanden Plas almost has a "traditional metal" style with guitar progressions, but their use of "movements" much like classical music and bringing in choirs and a small orchestra etc....... they sort of OWN their own market in my ears.