As a seminary teacher, its one of my most used and favorite apps. This latest version fixed some important bugs, but there are still two big ones:
First, footnotes are still backwards in many instances (e.g. 19c, 19b, 19a). You can see examples in Acts 26 with some correct and some not.
Second, when reading a lesson, if you click on a scripture link, the side bar opens and you lose your place because it jumps to another part of the lesson. If you find you find your place and then close the side bar, the same thing happens.
Im using an iPad mini with current iOS.
HyrumA about Gospel Library, v4.0.4