Summary: I used to work in a bank and had to add up thousands of checks each night. We depended on heavy-duty adding machines. This is nowhere like that, but it's about as good a desktop calculator as you can get for home.
Summary: Somewhat disappointed with this item. I purchased 2 in September of 2014. One works just fine and the other one no longer has a working decimal controller. Both of the calculators have had very little use so there should be no reason for either of them to be having any problems.