A couple of other very minor complaints: it doesn't have a "clear all" key, just a "clear entry" key, so you have to hit the total key to ensure that you're starting with a cleared calculator

Having the "total" key where it is -- by your thumb-- and having the single zero key a bar instead of a small key is WAY smart.

It was in an original box, but the keys were dusty, like it could have been a display or a return.

The keys are precise, and does what your finger imply.