Summary: I am used to a HP 17, but I needed a simple calculator to use at work. I wanted the parenthesis function though, and this one has it. It's easy to read, use and is very practical. Serves my purpose perfectly.
Summary: Only down side is that it isn't solar powered. Otherwise a good, solid product that hasn't failed me. It has several nice features that I should have read about sooner. Easier to use than a lot of other calculators, once you figure out the tricks.
Summary: I bought this thinking that it was another really similar model I had seen with equation solver. It was a surprise finding this instead. If you want to buy a calculator, spend a few more bucks and buy a more complete one.