Summary: This sits on my desk and I use it nearly every day. It works great for simple math I need to do every day. The buttons are big and push easily. The screen is clear. Twin power means it works on battery or solar energy so it always has power. I only wish it had a few more digits on the screen. Eight digits is enough to get me to hundreds of thousands with cents. I would prefer to be able to get into the millions with cents, so ten digits would be better for my needs.