I am. Before I had the eDGe I would print out their papers and mark them and hand them back the hard copies. I had tried using comments in Preview and Word but it takes more time and the students don't seem to respond the same as to physical markups. The upside of using comments was I had a record of what I had told them they needed to fix or work on, which I didn't have with the hard copies. The marked up pdfs on the eDGe get the same response from students as the marked up hard copies and I have a record of my comments at the same time. I also have all the files tagged by course number so it's a lot more organized than stacks of paper on my desk.