I'm specially interested to know what you think of the screenshots (too many?, too few? too small? too big?) and if you prefer the animated gifs (there are a couple) or a video (there's a short one).
If you’re looking for a reader for your book, I’d be happy to be involved!
Nevertheless, the post is well written and easy to follow. The screenshots are useful if you're scanning to see what the content is before committing to actually reading the whole thing.