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 replaced a Casio calculator with this one. I liked it and would have bought another like it, but after reading the ratings on Amazon, I bought this one instead. My needs are modest, but this calculator fulfills all my needs.