This pdf reader is great for students who read a lot of pdf docs and want to save on printing costs. I don't use it to collaborate with anyone, so I don't know how that works, but judging by the other great features, I'm sure I'll like it. It has a very easy to use visula organization and surpasses the customization features available on the Adobe Reader X I recently downloaded. I only wish I had found it sooner as it could have been very useful this semester. This is the solution to all of my problems. 5 stars, 2 thumbs, etc., etc.