Underwhelming, at best.
I was excited to get this, but now that I've read it, I am most thoroughly unimpressed.
The best thing that can be said is that this product takes a lot of scattered Candlekeep lore and puts it all in one place.
Sadly, it also feels like an advertisement for the author's other products, which are mentioned repeatedly. And it also feels like half of a supplement, with the added filler of another resource focusing on temporal magics -- an odd fit.
This product has value, but you're paying for a lot more than you're getting.