Do not waste your money on this reject!!!! Shame on you, HP!!!
V. Orlov, Amazon
3 June 2010
Summary: I have HP 12c which is a great calculator. Easy to use, slower than I would like but a good calculator overall. I needed a second calculator for my home, so I decided to give another model a try. HP 20b looked like a good second calculator for the home. Oh how wrong I was.
Summary: Update: An employee at the HP Calculator Group has responded, "we are aware of the issue". Nothing has been said about what HP will do to fix/ replace these calculators. The following is my review: Unfortunately, I have to report that this calculator and it's successor, the HP 30b have a bug.
Summary: The keypad is absolutely horrible. Otherwise, the calculator is great. It has a lot of features including the normal, chi-sq distribution and others. If you don't need these extra features (that the 12c doesn't have),don't buy this calculator.
Summary: Shuts off.. this is 2nd one I've owned. It shuts off all the time in the middle of entering data!! Extremely frustrating especially if you are inputting lots of data... Threw away the first one.... 2nd I use only if I have too..