The cuff is large, so it fits most arms really well. Mine had no problems and I am a plus sized woman. The buttons are simple to understand and the screen is backlit LCD. I love that it comes with a travel case, too. It is a great on-the-go monitor.
My readings were similar to my usual doctor readings, so I felt confident that it worked well. I would recommend this system to anyone, as monitoring your health is important and this is a very well made at-home monitor.