Summary: I really dislike devices that deprive the user of basic controls. And this one has no on/off switch, and only shuts itself off after 10 minutes. The size and keys are ok, but nothing special. Look elsewhere.
Summary: I ordered this calculator because I couldn't balance my checkbook with the cheap little ones I had. I got a different answer each time because I didn't press the buttons right. I balanced this checkbook on the first try and never had to look back. I love it and I can trust it. I saw in previous reviews that is was big...I don't care I love it.
Summary: You won't misplace this calculator very easily - that's for sure. I should have read the exact dimensions before buying it. It's measurements are 7.25 X 5.25 inches (seven and a fourth by five and a fourth inches). But I still like it - no need to use my reading glasses. I especially like the large tilt up display. It has a lot of features not found on non-scientific calculators, so that is a benefit, too. It is both solar and battery powered.