This is my second HP 12C calculator. The first one lasted from 1982 to 2014, and it was solidly built. This new one, purchased in 2014 is already showing signs of pending failure (not due to batteries getting low - I've checked). This one is more cheaply built than my old one, and I am quite disappointed in its performance and the cheap "feel" of the calculator in general. The keys do not have that solid feel to them. All in all, I would not recommend this calculator.