I read this book after reading Children of the Sea by the same Mangaka which I absolutely loved. Having now completed Witches, I have mixed feelings about it for sure. I think the stories in the second half of the book are far stronger than the stories in the first half. If all the stories had that same quality, I would be rating it a 8/10. I would say the first half of the book ranged from 5-6/10, with the opening story not being one of the stronger ones.
The surrealism is really fun and the art is good (if you like the artist's style - it is a bit scratchy/drafty at times). Compared to Children of the Sea, many of the panels can be hard to follow and the flow of the stories are often clunky. At times it was hard to follow what exactly was happening, I had to read through and piece it together. Sometimes it feels like there are too many frames for a specific area of the story, and other times it feels like critical ones were left out. The shorter stories really suffer from this while also feeling either half-baked or lacking a real fun "point" to it all. I can certainly do slice of life stories, but the shorter stories don't quite feel like that. They seem more as though they had a point to make, but it was either too superficial presented or poorly done to have the intended impact.
The three longest stories in the book are the best and drag the rest across the "worth reading" line. I think if you've read other work by the Mangaka and you like their art style - this is worth looking at. However, it is indeed an anthology series with no real connection (it said they were interconnected but not really) story to story and I think generally worse than Children of the Sea in most ways.
If you read Children of the Sea and liked it, go into this with no expectations of similar quality. If you didn't quite like this book, do not let it put you off from Children of the Sea (unless you hated the art style - which is largely similar).