Summary: The worse thing about this calculator is that the keys feel loose, as if the holes they fit in are too big. They sort of wiggle when touched. Even though i'm an experienced ten-keyer, I've made mistakes with this unit because of the loose feel of the keys. I really should have returned it, but it wasn't worth the hassle. It has been relegated to the least used calculator.
Summary: Bought this as a desk calculator so that I didn't need to keep opening the Windows' calculator all the time. I'm not great at math, so it makes my life easier. As a programmer, I need to figure out percentages and add up numbers a lot. I don't use the advanced functionality, but it adds, subtracts, divides and multiplies great. Display and buttons are large enough that I can see without my glasses. I don't think the keypad could be used for touch typing, though.
Summary: Size is 5 3/4 x 5 3/4. Nicely made. Large viewing area. Number pad is nice size. Shows 12 digits. Much more involved than what I need but if you need a tax and business calculator this is great. I thought it might be too small as my previous one was much larger but this is just right and would be great for take and go. I recommend it.. It would have gotten five stars but I feel that the instructions could have been more involved or clearer (at least for me).