That's a shame since MV2 is possibly the best Monster book they've put out.
Only if you're running heroic tier or specifically using Nentir Vale or want to import all those organizations. For someone who runs his own homebrew and whose party is 12th-13th level, and who uses minis instead of counters, MV2 offers a mere
34 monsters of equal/higher level for the rest of my campaign.
Note that I said I
barely bought it. Every other monster book so far has been more of a "getitgetitgetit!!!!" for me (except Draconomicon 2).
Don't get me wrong, I like the book and the monsters vary from good to great; but the
content, in terms of usability for me in my campaign, sucks butt. And I really don't feel like I should hit the reset button just to use the new (heroic tier) monsters in there.
MM3 had tons of usable awesome and wins against MV2 hands-down simply for having monsters all the way up to epic.
Heck, I'd even give a book as old as Open Grave the edge over MV2, despite its obsolete mechanics, simply by virtue of the cool variety of monsters and levels in there.
So yeah, I paid about $1 per usable monster, and that's assuming that I don't weed anything out of those 34 monsters as unsuitable for my campaign. On reflection, it's pretty far from a great value for my campaign as it stands.