Select book (can be bought directly in the app - if you have no subscription), then there is a small visual product overview. Click items, off you go. Well prepared for display on a Kindle Fire HD. Optionally you can view the PDFs simply, the ME is but significantly worse for reading on a relatively small reader. Maybe on an A4 Tablet ... Only criticism: The first login and the navigation are a little unintuitive, so rather 4.5 stars. But now times not perfect. (Whether the price / performance ratio of the journal matches, everyone has to decide for himself.)