I too disagree with some part of the review... With the
4e 30 levels spread, there is limited use for NPC stats... They end up being too powerful or not enough for my use.
I think informations about how such and such NPC interact, what plots/adventure hook they can be tied to is far more useful.
For the manual of the plane, I want fluff, not crunch, mostly. Sure, a few more generic hazards can be good (but, in fact, the game system make it easy to adjust up or down the level of a hazard...), as well as monsters. But key NPC ?
And I do like the new Hell/astral sea. Works much more nicely with my soon to be
4e setting where space = astral
