I don't follow Critical Role, though I'm glad it exists and have nothing against it or its fans. I know nothing of the setting(s?) for it and the marketing fluff for the books isn't helping because most of it assumes you already know Critical Role. What is unique or interesting or especially well-done about the setting material? Would the answers mean anything to a non-follower of Critical Role?
As a bonus question, there's at least three setting books for it. Are any of them particularly better or worse than the others? I take it Wildemount is narrower in scope - does that help it or hurt it?
		
		
	 
Okay so moving past people trashing on the setting with nothing to say…
The Wildemount book is very very good. I wish more setting books were set up like this book. The sections on each city is just wonderfully done. 
The first Taldorei book is kinda weak imo, I’d skip it. 
The setting has a wide range of very cool notions and elements, as has been discussed in this thread already. Has anyone mentioned Vasselheim? Or that one city in the north where dwarves and elves are? Lots of cool places. 
And then you have the very good combination of ancient wonders and a world that is better to live in than the past, rather than just romanticizing the past, 
I really like how it is a world with some advanced magical tech and mundane tech compared to most D&D, but it’s brand new. There’s like. Dozen airships in the world, but airships aren’t impossible to run without a special bloodline at the helms (love Eberron but this is my least favorite part of it), and firearms are less than 50 years old. 
Another thing where I prefer it to Eberron is that it doesn’t take the IMO silly take that magic as tech would mean no tech advancement, rather than the two both developing and mixing. 
Tbh I think if you read the Wildemeount or The second Taldorei book you’ll get why it’s a cool setting.