My personal problem with git was inherent inefficiency of CLI. E.g. I was typing "gs" to see the status almost after every little command. In Gitbox you just see the status. Similar thing with submodules: you need to get in and out, verify the status of a submodule and its parent. In Gitbox you just see the whole picture and click a single button to do something useful.

My question is not to git CLI guys (they are doing great job, by the way), but to others like Tower and SourceTree: why in the world they complicate things so much? If one needs a very flexible/configurable environment, git CLI is just fine.