Summary: In general, I have been using HP products for over 35 years. their calculators are the finest in the world, they are very reliable, for the few month that I used. UP50g is excellent, and very reliabl.
Summary: The only reason for three stars is how difficult it is to understand. Apparently my thinking as a retired electrical engineer is not the same as those who have no trouble using this machine. It's not the RPN. That's easy. Nor the keyboard.
No problem with the calculator, but it was packaged ...
Amazon Customer, Amazon
11 October 2015
Summary: No problem with the calculator, but it was packaged as a Spanish version. The hard copy instruction manual was worthless since it was not in English. Not a huge issue, but should have been specified prior to order placement.
Summary: This is not a calculator for "normal" people. It is a calculator for people that will use it to help them build circuits. It is a calculator for people who use math and equations as aids to their practical experimentation.