How I Use It
My students use it to take notes, as a digital mini "white board", to write rough drafts, to fill out activities in PDF form, then submit to my course web site. From the teacher end, I can easily download student work in Notability (as a pdf), make corrections and email corrected pdf to the student. There is also a microphone in the app that students can use to record lectures that can be helpful for students with disabilities.
Notability is a "must have". My students and I use it on a daily basis. It's easy to use, especially for note-taking or art projects. There is a magnifier that lets the user write fine, detailed notes. It's easy to create shapes and import images, also.