I'm using Gitbox to to do version control of my dissertation, which I'm writing in LaTeX. All I want to do is to be able to log what I've done in a writing-session, commit the changes, and form off branches of the writing project whenever I'm making changes that I might potentially want to reverse.
This is the first version control software that, for a non-programmer like me, was easy to setup and to use on my laptop. For my use, I simply wanted it to track my local files on my computer's harddrive; I have no use for an offsite repository. The fact that it comes with Git means I installed, chose my dissertation's folder that I wanted to version control, and began.
It is extremely easy to use, both for committing, and for making difference comparisons between changed files. It is quick to load, it is stable, and the UI is very clean and easy to understand. Installation requires no command line or other non-Mac-like installation procedures so common with many pieces of version control software.
If, like me, you want to use version control to keep track of a major writing programme, look no further. The fact that you can use it for one repository -- one writing project -- for free, is something I am grateful to the developer for.