I read this over the course of a month before bed, and I have to say it was thoroughly enjoyable. I'm not really a big comic book reader, but I like the Ant-Man movies a lot, so I gave this a try. As a general feel for what it is like, it makes fun of a lot of the tropes of the comic-book genre in really clever ways while also having some good heartwarming and funny stories. The humor doesn't break the fourth wall like a Deadpool story might. Instead it is more of a self-aware type humor like this quote from Austin Powers: The Spy Who Shagged Me: "You know what's remarkable? That England looks in no way like Southern California."
As far as the story itself, it does follow ex con Scott Lang, like the Ant-Man movie, and his central struggle is maintaining his relationship with his daughter Cassie. Darren Cross is the main villain, albeit very different from the movie. Hank Pym makes a few appearances, but is not in any way a central character. Then there is a whole cast of other characters from the Marvel universe including the Falcon, She-Hulk, the Beetle, Iron-Man (hilarious, I might add), and many many many more.
As far as the collection of the comics goes, I thought it was pretty good. There is this bizarre part about halfway through where the world ends in a flash, but the next comic it pretends like nothing happened. I assume this is in reference to some big crossover event in the bigger Marvel universe, if anyone would like to let me know what that was all about, that would be very cool of you. Other than that, it was very easy to pick up and follow the story.