Haven't read much through it. Which is off given I got the hardcover through a Kickstarter. It does require the Tome of Beasts (which *is* a book I can recommend), but the art is great and the writers behind it are solid.
There's so many lairs that even if you don't like all of them, you will like some of them. And even if you don't use it straight it can serve as a basis for a lair, or even just as inspiration for adventures.
The Amazon reviews were positive but brief and thought this board would have more insight.
I have the Tome of Beasts so will go ahead and give one a try, thanks.