It was difficult to align the pins on the band with the tool's pin, and I would not call it easy to use.
I am not an "un-handy" person, but I struggled with it for about thirty minutes. Neither the tool itself nor the watch, came with directions of how to best use the tool. I became frustrated, and was afraid of scratching the metal band on my new watch,
so I wound up going to a jeweler. He did the job in less than 5 minutes.