Ranked in these QuestionsQuestion Ranking
Pro Clean and easy-to-use interface
Pro Native OS X UI
Pro Integration with a variety of remote repositories
GitHub (and Enterprise), GitLab (and Community), Bitbucket (and Server), Visual Studio (And TFS), Perforce GitSwarm and BeanStalk.
Pro Pull Request management
On some repos.
Con Paid subscription model
Dog slow for large repos. If you have a lot of files you want to stage, you're out of luck. You have to use the command line. UI is slow with large repos.