I have everything that's been published so far for Eberron and WotVB is by far and away the worst of the bunch. It's the only bit of material, including the Dragon articles and Dungeon adventures, that I wouldn't use as is.
It's very obvious that they decided what 'set piece' encounters they wanted to use and then decided to try to write a plot around it. It failed miserably. The set piece encounters in themselves are okay, with some info that's liftable, but the way it ties together completely breaks any suspension of disbelief, even in a D&D game.
I can't justify this as an 'aside' to the 'Schema Adventure Path' either. If I want a side adventure to a series, I'll insert it myself. I'll use an adventure from Dungeon, or another publisher. Anything. When I buy part of series I expect that adventure to continue with the themes and plots already planted. I don't want an interlude. The
only connection to the rest of the series is an NPC which the PCs will most likely never even realize they know. Let's just ignore the fact that his reason for being there in the first place is utterly unbelievable knowing what we know about him.
Between horrible NPC motivations, ridiculous villain decisions, and an eye-rolling 'climax,' you can leave this one on the shelves. Spoiler:
Okay, let's have the villain retreat to this ziggarut, run through without disturbing anything, and let him wait for the PCs in the most inaccessible chamber. Yeesh! End Spoiler.
And let's not forget the opening encounter which is just silly enough to make the PCs completely doubt the competancy of the (Spoiler)
King's Citadel.
As you can see, I am bitterly disappointed by this module. Maybe I've become biased because I find everything else produced for Eberron to be so high quality. In my campaign I combined and heavily modified The Forgotten Forge and Queen With Burning Eyes (the second weakest Eberron adventure) which my players loved and now we're on our way through SotLW. They will not be playing through WotVB, not will they ever hear about it from this DM. Grasp of the Emerald Claw, however, is going to be a real hoot.
I hate doing this. Maybe it's just because my week has sucked. I love giving rave reviews of products. I hate ranting about any. But this is just too much of a bitter disappointment to be ignored. I'm hoping my small voice provides enough feedback to WOTC for them to hear a "Please don't do anything like this again!".
Anyhow, I talked a bit about everything published for Eberron in an article
here . It's a bit behind now, not covering Grasp, Sharn, nor Fallen Angels, but you can tune in there for some kind words about the other Eberron adventures.