Witch Craft Works was a bit of a struggle to finish. Even though I haven't watched the anime, from what I can see, I have a pretty good idea of which parts of the manga it covers. And I can safely say it adapts the absolute best part of the series, because after that point, the manga's quality drops significantly... Story: 6 I'm not sure exactly how faithful the anime adaptation is, but if it's a good one, I'd 100% recommend just watching it and stopping there. After the first major arc, the story basically turns into a slow-paced slice-of-life. They rely way too much on backstorychapters, which completely stalls the actual plot progression for several chapters at a time.
While I usually appreciate getting a few extra chapters after the climax to see the aftermath and where the characters end up, they completely overdid it here. It almost feels like the author had leftover chapters to fill before ending the serialization.

Characters: 6
For this section, I'm focusing specifically on the personalities and the dynamics between the cast. The reason I'm giving it a 6 is that, even though the factions are straightforward (good guys vs. bad guys), everyone constantly hates and fights with each other within their own groups. Or, conversely, you have "good" characters getting along better with the villains than with their own allies.
Another negative point is that they introduce some really interesting characters right at the very end, only to save their actual development for the manga's sequel...

Art: 7
Here I'm just evaluating the backgrounds and the fight choreography. Overall, it's pretty good; I don't really have any complaints about it.

Character Design: 9
This is where I have to give a standing ovation, and it's honestly one of the main reasons I even finished the manga. The character designs are amazing. The witches in their battle outfits look incredible, and the manga showcases this really well. Every battle costume is unique and wonderfully over-the-top, making each character's final form look absolutely stunning.

Overall
The story definitely drags after the point where the anime presumably ends, making it a bit of a slog to read, though not impossible to finish. However, the character designs (especially the outfits) are incredibly detailed and carry the series. The manga wraps up decently enough, but it doesn't give a fully closed ending, intentionally leaving the door open to continue in the sequel.