Summary: I've had one of this model for a number of years, and it's worked fine when needing to use one where low light doesn't power one of the solar varieties. When the digital display was beginning to fade and it didn't always power on I figured it was time for the battery to be replaced. I ordered replacement batteries, removed the screws from the back and took the case apart.
Summary: I needed a small calculator for my desk and purse. This is perfect if you aren't one to have an "app" on your smart phone and want something old school. It was a great price and a great product.
Summary: I bought this for myself. I carry it in my purse for grocery store trips, recording gas mileage in our vehicles and whatever happens that I need it. It is small, easy to use and serves my needs very well. I do recommend this easy to use calculator.