I use it as my daily driver for any git operations, but most people prefer command line.
So for a typical person it is useful early in their developer career as a helper when learning git.
I was a disgruntled user of ungit for the past 10 years. Even considered rewriting it myself manually like 5 years ago. Well not anymore.
In the past few weeks I built a fast, animated git GUI from scratch
ingit makes branch switching, merge previews, rebases, cherry-picks, and reflog recovery feel instant. I would highly recommend especially if you're new to git.