I love this Texas Instruments Standard calculator.  I had another one that I used for about 25 years and it died.  I wonder why?  lol  Anyway, I needed a simple, everyday calculator, so I bit the dust and bought this one.  I love the spacing of the keys.  I'm elderly and my fingers and eyes don't work as well as they used to.  I can see the numerals and find the keys, and the answers are right!!  I highly recommend it if you want a simple, basic calculator.