1. If you want to do something advanced, it will be a lot easier to find help online using regular/original git commands
2. You still need to learn this new interface , so you will end up learning too different command line interfaces (one for the easy stuff and one for the advanced stuff)
3. You will surely, almost certainly mix the two interfaces
Use and learn git "original" commands to do advanced stuff Use a nice UI for the easy straightforward stuff
The only alt command line interface I might consider is magit, because it mixed the emacs commands with GUI elements, and still i think magit is not all that because its not GUI enough, if magit becomes faster and more graphical, only then it might make more sense (for now its really only for emacs hardcore users)