Summary: I did not expect it to be so huge. It was not obvious from the photo. However, now I have gotten used to it and it is actually quite convenient to use. There are a couple of functions that it seems to be missing though.
Summary: Just got done doing some paperwork and this unit is very nice. Very clicky buttons that respond to different pressures. Love the back button for mistakes. Nice display that shows what function you just pressed incase you forget what you were doing for a second.
Brother Cannon "The things you own end up owning you.", Amazon
5 January 2014
Summary: I purchased this calculator for use at my job. The Dual screen allows me to work on two independent math problems at the same time. I don't need to remember or write down any numbers now and allows me to work much quicker. Over all the quality is great and holds up to tons of button mashing.
Summary: This is not like those very big desktop calculator. It is not big or small, with a large display and buttons that are easy to press. Its unique function is the dual lcd. In simpler terms, you can see what you place in the memory.
Excerpt: I have used the same Casio fx-450 Scientific calculator since my school days in Chemical Engineering for past 35 years. Most other calculators failed but Casio out lasted all of them. I just bought Casio DV-220 for my wife with the confidence that it will last for ever too !!