My experience with the book became a bit meta. I greatly enjoyed the first half or so of it. Though it did start to feel a little repetitive after a while. But I couldn't get past the first half because all the black line "redactions" started making my Kindle unstable. First time I've seen an ebook's formatting crash the device.
Eventually gave up because of the constant slowdowns and crashes. Which in many ways fit the book. I liked thinking the data within was so dangerous and alien that my Kindle could not handle it. I know this wasn't intentional by the author but still, it was a nice metafictional touch.
I suppose a future horror novelist could replicate this intentionally. A creepy combination of symbols guaranteed to overwhelm a limited memory ereader. Coming at the right point in the story, it could be effective. Though it would also lead to a ton of 1-star reviews.
The redactions are definitely overused. There’s some pages almost entirely redacted. It would be more effective to write a shorter sentence with some mystery than to just block out a large portion of a verbose page.