I do find SourceTree to be an important part of my toolset. For minor commits and status I use the command line, but whenever I need to work on something important on a large project I like the overview a GUI can give. Especially when I decide to juggle razor blades with interactive rebases and cherry picks. Though I still have to dive into the reflog occasionally... :)

And stree makes it so easy. The easy hunk inclusion is excellent etc. Whenever I spot a dodgy commit by someone they usually have done it via command line and not checked properly what they are including in the commit.

I just wished they would make a linux client for the 50% Im on my linux box. I tried a lot of alternatives: Tower, GitG, SmartGit, etc. Whilst admirable they are either too basic, not polished enough or lack some basic feature I depend on. Hopefully they will get better or Atlassian releases a Linux client.