There are a number of points where I stopped reading for a minute to just stare somewhere else at the existential horror of realizing what the book had just revealed. One of these moments had to do with the idea of your data, meaning everything that makes you you, being corrupted during teleportation, in the same way that any computer data can be corrupted when being transferred. And are you really you if your body is destroyed and reconstructed elsewhere? And what about trauma? Does trauma make you less yourself? And if you could start over, technically, without that trauma you experienced, would you do it? I appreciated what this book did with these ideas so much.
Jessica is a great character; both of her selves and POVs were enjoyable to read, and I love how it slowly reveals information about what happened "before" by going back and forth between them. The other characters are all very background, though, and it's probably the book's weakest aspect. The descriptions of the setting and technology were immersive, and I never felt like the story was info-dumping. The thrilling parts were effectively thrilling, and the ending gave me emotions! I still have so many questions though.