Harder show to grade than most because there are two significant halves that don't frequently meet in any center or mix particularly well. Kumoko's half of the show is charming, enjoyable, and worth watching. Shun's half of the story and world is so lifeless and generic that I think I'd sooner recommend a supercut of the series that removes all the content centered around the humans' story. The animation is also ranging in quality, from "that's not animated" to "okay, that's kinda animated", to "hey look I'm watching a decently animated series." You can usually expect one of the better fights or animated sequences to follow in an episode after one that is noticeably, jarringly lacking in quality. They make good use of the 3D medium to put together some interesting, frenetic fights with heavier camera work than you'd see in most anime (AoT notwithstanding.) But most of the time, outside of Kumoko's cute animations, everything else looks genuinely awful.

In regards to the overall story, there's a neat plot gimmick that is fairly easily sussed out and I'm not certain about where things are going or how they'll conclude. So that's a positive. It feels rather rushed, like there is possibly a fair quantity of missing detail, but whatever. If you're watching this due to my recommendation, you're in it for Aoi Yuki's incredible voice acting and charm as our protagonist Kumoko. She's a very fun character to have on screen and that will be true regardless of what segment of the story is being told.

That's the gist of things. But apparently I have to pad out this review in order to post it, so I'm going to go into some detail regarding some of the elements I liked in particular. I'm just going to preface at the gate: I'd personally consider this spoiler territory. Things that are extra spoilery are marked.

(Sigh.) Appraisal!

• I thought that Kumoko's suite of abilities presented a fairly unique approach to the overpowered reincarnation.
  Spoiler, click to view

  Her parallel minds ability is a fairly fresh ability that I haven't seen exhausted in anime. It services the action by making her feats seem a bit more feasible. She's essentially a party of four in one. Granted, they are all the same Aoi Yuki voiced spider girl, so the range of their creative thinking should possibly be limited. But rather than think about that, it's more fun to consider what you or other characters could get done with 4 parallel minds acting in cooperation. Ever see Pixar's Inside-Out?
• The way they lead you to figure out the plot gimmick is subtle but fair and thoroughly enjoyable.
  Spoiler, click to view

  I've long anticipated a story presented in this way, observing an innocent character as they go about their actions, but knowing that from the outside you're watching the rise of a powerful entity that has already shaped history in the "present."
• I'm satisfied with Kumoko's lack of hesitance to destroy NPC's or anybody trying to off her
• The morality isn't immediately clear.
  Spoiler, click to view

  Having Kumoko begin the story accidentally delving into the taboo offers a bit more to think about. It's like if you started an RPG unaware of a morality system and your first action was sinful, leading you wandering into the dark side just trying to survive rather than seeking it or avoiding it. In addition to that, the question is raised about whether the Isekai world is real or worth protecting to begin with. Where will we go from there?

So there you have it. Spider story good. Human story bad, ranging from lullaby to laughingstock. Put them together and you've got a show that most people ought to skip. But if you appreciate a show that hangs on a single enjoyable character, maybe this will offer enough to you.