If you're an old-school comics fan then you know what EC Comics are, and you probably already appreciate their committment to quality - these artists/writers cared about their product, even if it was "just" comic stories about horror and sci-fi.
The four-book collection packs a LOT of stories into a high quality slipcase. Each book has about 25+ stories that cover a long era, as well as an accompanying essay on the artist being focused on. My only complaint was a couple essays included references to comics that were not in the book, which was too bad because after reading about them, I wanted to see them!
Now - you can't expect revolutionary storytelling or even artwork. This WAS the revolution that all the artists of the more recent past (Frank Miller, Laird/Eastman, many others) used as their inspiration. So if you think, "this is kind of dated...," yeah, of course it is - but without it, there's no "Avengers" movie. These stories let comics be taken seriously.
The war comics by Harvey Kurtzman especially do a good job of walking that line between "comic entertainment" and a mature commentary on war itself - we could use more of that in 2014, instead of rah-rah hero worship we often get instead.
The sci-fi volume is the weakest -probably because the fairly simple stories might have been groundbreaking at the time, but feel very derivative now. It's the other way around, of course, but that's what happens with older stories sometimes.
If you're a comic fan, you will like it, and it's a big enough collection that it will give you a lot of entertainment for the money.
The comics are black and white - that's too bad. They lose a lot without EC's original melodramatic color. No question that's a flaw. HOWEVER - the reality is color would have made it cost-prohibitive; while I don't like the b/w because it does lose an important aspect, I understand that's how it had to be. But, I'm not giving it five stars.
On the flipside - the production quality is high. The hardcovers is heavy and well-made, as is the slipcase. I appreciated that, and it's a fair price in that regard. If/when they put a second four-volume set out, I would probably get it [edit - it's already scheduled for April 2015! So yeah, I'll buy it next year sometime].
The horror comics are the ones I like the best - I'm not sure when culture got into the "bad guy wins" mentality, but in EC Comics - the bad guy ALWAYS gets what's coming to them....and it's never, ever, pretty.