I use this for simple computations at work, mostly adding and subtracting with some multiplying and dividing. This is a simple calculator but solid for what I need it for. I previously had a cheapo office depot calculator that worked well too but I got this one to help me get free super saver shipping with another item. There are previous reviews that mentioned this calculator only has two rubber stickers on the underside (the two are at the bottom of the calculator - under the '0' and '+' buttons respectively). I did notice that even for my simple calculations that it moves around - kind of a bummer. So I just removed the two rubber stickers on my old calculator (why only two on all these calculators is what I want to know...) and stuck them on my new one. And no more movement. No I am happy with it. It does its job.