I use GK for everything and usually only use CLI when there's something a little exotic. I like seeing it update in real time on another screen and I like the diff engine for quickly assessing changes and making sure everything I expected was altered and nothing I didn't. I know there are other tools but GitKraken is the fastest for me.

Also have found it a good tool for teaching other engineers (usually older) how Git works. We tried out Sourcetree but it was super clunky at the time.

If I had to find a tool between pure CLI and pure GUI I'd probably recommend Emacs Magit porcelain. Works quite well.