I finished the manga last night. I'm sort of mixed on it. Expect a shitload of spoilers ahead so DON'T READ THIS IF YOU HAVEN'T FINISHED BOTH THE SHOW AND THE MANGA.
I LOVE the art. I think the art rivals legendary mangas like Berserk on a regular basis. There's a shitload of Akira inspiration which means there's a lot of extremely high detail scenes of buildings getting destroyed and everything looks fucking amazing. I wish I took more screenshots because the sheer volume and quality of all of the two-page-spreads was fucking shocking and I want to show them off. The art alone is worth reading the manga, and it NEVER slows down or stops being good.
Unfortunately due to the extremely small panels this leads to a struggle to understand what's happening in certain scenes, and sometimes pages required a re-read from me because I just wasn't following the actions of the characters. Alongside that, the speech bubbles are oftentimes not pointed at any particular character which means that a lot of the time you have to use context clues to even have a chance to figure out who's speaking. Even then, sometimes I was just forced to guess because there was just dialog in bubbles and nothing else.
I feel like if the panels were bigger and the speech bubbles were handled better, the manga would be MUCH more readable. The lack of tails in particular made it a super bad chore to read at times.
The story is extremely good as well. I still feel like the anime handled the plot with much more grace and elegance, removing a lot of superfluous details and things that aren't exactly "necessary" to the experience while still maintaining the themes, messages, and core concepts of the plot. It ties everything together better, there's nothing stupid happening, nothing. It's nice, concise, and gets the job done.
However, the manga provides a much more "full" experience and includes a LOT of things and details that flesh out the characters and world much more. Despite that, I still consider them almost equal.
Wolfwood's arc is much more well done in the manga and I actually cried when he died, which is the first time ANY manga or comic has ever welled up any kind of emotion in me. I wasn't really a fan of Livio/ Razlo at first and I still think it's kind of... ehhhh in my eyes but I think that character was handled very well overall, and I liked how his story ended.
There's a lot of stuff in the manga that's kind of stupid. The whole "Wolfwood is actually several years younger than he appears to be" thing is kind of... meh? It's silly, unnecessary, and it doesn't fit his character in the slightest, but this plot point is used to such emotional effectiveness I can't help but feel like it deserves a pass.
Wolfwood and The Eyes of Michael all being basically superhuman teenagers that drink super-mega-ultra-giganigga-retard-powerful healing potions that make them so durable they can basically get shot as much as they want without dying is also fucking silly and retarded. It feels like some bullshit the author came up with to excuse Wolfwood getting the absolute shit rocked out of him in almost every fight and still surviving. I would have much preferred if the healing potions were something unique to Wolfwood, and that's what made him special in comparison to all of his peers.
I also think that the scene where Vash learns that Wolfwood is a Gung-Ho Gun was cut extremely short and it should have had more impact. It could have and should have been done in an extremely different order in order to bring more weight and context to Wolfwood's final scenes.
It's such a great idea for a perfectly good reveal that would be unfathomably amazing to read that felt like it was done as an "oh yeah there's this too" moment because the author literally forgot about it.
The biggest problem I have with the manga however is the ending; which was kind of a stinker all things considered. I don't like the "rest of humanity" showing up last second, because it feels like the stakes were just sort of fucked with for no reason, and the story wouldn't ACTUALLY be changed if that entire plot beat was removed entirely.
Not only that, but the asspull reveal that the rest of humanity has ALREADY SETTLED on other planets and that No Man's Land is just a backwater shithole that nobody really cares about made the whole experience just lame as shit. Not only that, but apparently Plants turning into basically normal people with magic powers is something that has already been extensively researched and figured out is ???????
Both of those things in combination with the setup of the ending being sort of stupid overall lead to a kind of weak baby fart experience that was only upheld by the sheer excitement and weight of Vash's personal ending. The stakes were fucking pummeled into the ground beyond comprehension when both of those things came to light and it almost retroactively ruined the entire manga for me-- fortunately it's extremely easy to ignore.
All of that being said, I still very much enjoyed the manga and it's going into my "recommend-to-everybody-I-meet" list but I think that the show is a much easier and more 'clean' viewing experience. Shit started to drag on at the end because the final battle is literally like two whole goddamn books which is kind of silly too.