Have you ever tried to compile comments on a document from multiple sources?  Email a pdf around to your team and ask them to send comments back to you?  Then you get to dig through the comments and compile into one version, or worse, you send multiple versions of the comments in effort to confuse and frustrate the original author of the document!  If you’ve experienced these frustrations (as I have many times), take a free trial of www.reviewstudio.com, a website that allows documents to be uploaded and shared with multiple team members who can comment in real time and avoid the headaches of compiling comments.  I’ve used reviewstudio on building drawings, legal documents and renderings with great success!  (I am not affiliated with reviewstudio.com, just sharing a good product).