It works OK as a replacement for the whiteboard, with text faithfully reproduced and some basic graphic functionality to draw arrows, ellipses, etc. However, I am not sure that the students will like it, as, unlike a rolling conventional whiteboard, text disappears suddenly when I start a new page, which can be very annoying when trying to take notes.

The big let-down is when using it to annotate Powerpoint. My intention was to leave blank spaces in my presentation so that I could work through problems in handwriting, integrated into the presentation — I liked this idea, because doing mathematical calculations and derivations works much better when they are hand written than when typeset, and I planned to save the annotated slides for the students to download if they wanted them. Unfortunately, though, Papershow does not integrate properly as a plugin to Powerpoint; instead it imports your presentation into its own software then shows the slides with its own viewer. This means that all but the most basic functionality of Powerpoint is lost, with none of the animations, embedded web applets, etc available, which means I really cannot use it in the way I had hoped.