However, even when you are sitting right next to each other there is value in a tool like this. If you are reviewing a large change set, you can huddle around the review tool instead of around your normal editor. This way you aren't tempted to make quick changes or fixes to the code on a whim, instead you are annotating the code inline. Code context shortens the length of comments, so you are more willing to make them. In person, I find that a lot of comments are said aloud, but lost forever when you fail to write it down or write it down without any context.