Usual spot for disclaimer: I prefer LoK to TLA. Sue me.
So, I don't usually rate (or read) comics, but come on, this is *Korra*.
To quote Asami: "I like Korra." Yes, Asami, we know you do.
First of all, this comics should be named: Korrasami: the Fanservice. This comic is basically one giant middle finger to all those who said that following the finale, the canon status of the relationship is unclear. (Insert the meme about Jinora and secret tunnel).
I could watch these two frolick over the Spirit World for 500 pages - especially as the art is really good and in line with the style of the series.
This is NOT a bad thing. It's absolutely sweet and I totally ship Korrasami and I was sad it received so little development and I am happy to see it followed, unburdened by Nickoldeon's S&Ps. And come on, that kiss! That said, I like my comics like I like my women - not only sweet and pretty but also with some more plot in them. Also I know this is a far less serious work (with a shorter storyarc) than the "main" seasons, but come on, the villain is just too one note. That, of course, can work (I'm looking at you Ozai and Unalaq), but after Amon, Kuvira and Zaheer it's kinda disappointing. By the way, I get he had some extra spiritual "umpff" but I still find it hard to believe he was able to beat season 4 Korra, you know, the one who took out Kuvira without breaking a sweat.
Oh, and Korra, we all love how hotheaded you can be, but this comic takes part after season 4. Shouldn't you have matured a bit? And your parents aren't Unalaq. Now go and apologize to them, young lady.
Fortunately the plot thickens in the second part of the story with Triad wars, portal unrest and presidential elections. The supporting cast is quite interesting, we get some good action scenes and Asami proves that even when helpless and at the mercy of the villains, she is never helpless and at the mercy of the villains. Also, when will they ever learn? "Sure, let's kidnap the girlfriend of the most powerful being in the world". Hashtag what can go wrong?
Mako/Bolin/Tenzin all get some nice action and Zhu Li is awesome as always. But the main strength of the comics is definitely its focus on Korrasami. These two are so sweet together, but at the same time the comic doesn't make a mistake of having everything be sweet and rosy. Korra and Asami are clearly just learning how to be in a relationship, with plenty of miscommunication and misunderstandings.
While not as good as the series itself, I liked it and am happy that I've read it. Now onto Ruins of the Empire.
As a side note: not that I don't support buying the comic to support DH and Korra, but the only valid way of "reading" it is through listening to the live reading on YT. Who wouldn't want to listen some more of Korra and Asami (and Lin and Bolin too.) Pity it covers only 70 or so pages.