Its okay.
I love the fact that I can take my books anywhere on the road, but theres a problem.
I have books that I have that I use for classes, and I type and highlight text for annotations. At first this app was working just fine for the first 2 days, and then the next time I used it, all my annotations were gone.
The annotations are still on the website, but not on the app. So if you want to highlight a text on Google Books I recommend the website than the app.
xHalfPrincex about
Google Play Books - Books & Comics, v3.0.2