My Take
I really like how this allows students to annotate pdf's in any way that they like. I feel like it's easy to use and a very practical way to bring technology in the classroom.
How I Use It
I would use this as a resource if I assigned a reading for students in class. I believe that annotating readings helps students to focus more on the material and take the most away from a reading, but printing out so many pages wastes a lot of paper.