Today I am going to upgrade my Nexus 6P to Android 7.  Installation went smooth, however, the Amazon Kindle app does not work when setting the display size to small. Update: I got a response from Amazon on my feedback with instructions to de-register my device, uninstall, and then re-install the Kindle app. Uninstalling and re-installing the app fixed the problem, so I am happy. With display size set to small I can see much more information on the screen.