As I listed in the "I would recommend to" section: Like classic dystopias and/or Jeff VanderMeer's works, particularly the Area X trilogy? It's perfect for readers who are intrigued by the idea of the unlikely intersection of that particular venn diagram. The weirdness seeps in drip by drip, building significantly in the final chapters, until all semblance of normalcy (quite literally) dissolves.
The very end was, for me, a bit anti-climactic, but just as with VanderMeer's Annihilation, the ambiguous nature of the final pages has grown on me as I've ruminated on the experience.
A few observations:
1. There are some really thought-provoking and unusual language-related speculations at the core of the story, as well as commentary on the nature of reality, matter, perception, consensus, history, freedom, change, choice, tradition, loyalty, community, family, fertility, the individual vs the group, creativity, convention, contagion...the list goes on.
2. There is a bleakness, a blandness, a rather dour, joyless, bureaucratic efficiency to the world that lulls the reader, making the weird currents even more effective at impressing their strangeness via the shift they introduce. The monotonous and mundane meet the nebulous and the alien.
3. I got an impression of experimentation on the part of the author, as if she were throwing various ideas into a stew to see how they would cook up together. This might not work for some readers, but for me it was great fun, as I'm a fan of thought exercises and philosophical riffing. But there are a LOT of ideas introduced (see point #1) - some explored, others only touched on and (sometimes vexingly) dropped - and the gestalt might be muddied or overshadowed by the many components for some readers.
4. The author doesn't do much hand-holding of the reader. I appreciate this approach, but some reader may find themselves shouting, "What the HECK is going on?!" right from the first pages.
5. If you finish this and enjoy it, you will probably find yourself mentally naming the objects around you ("Pencil-pencil-pencil...") and likely consider what might arise from changing those names.
6. This book is chock-full of rabbit holes down which one might fall - rabbit holes within rabbit holes - both of the "What if...?" variety and the "run to Google" variety.
7. A personal impression: When I was a little girl, my dad had one of those old-school label-makers that could be made to print out a little strip with bold, embossed text of one's choosing. He used to label everything in the house as a way of playfully-irritating my mother. One might enter the bathroom and discover labels announcing "MIRROR", "TOILET", "SINK", etc., on the appropriate objects. It was like living in the Batcave from the old campy original Batman TV series. I thought of that over and over while reading Amatka.