Summary: I bought the first HP RPN calculator produced as soon as came onto the market - it's power, and efficiency of key strokes to get an answer to any mathematical/structural analysis problem was immediately obvious. I have bought numerous models of varying complexity since that time, and settled on the 32s as the most efficient for my requirements.
Summary: Bought this to replace a HP 33S that I had worn out, Some of the buttons had broken free of their pivots & were floating around under the faceplate. Totally happy with the new one. Glad I was able to find a direct replacement. Some of the newer HP calculators have changes that I don't really care for.
Summary: I just love the reverse Polish notation. I have owned HP calculators for 25 or so years. The models change every few years so I make sure to buy more when I see that a new model is being introduced I have four others EXACTLY like this one. I use them constantly. They do not break but they can wear down after years and years of use.
Summary: Typical TI quality, all snap fit, the feet fell off almost immediately and the number 4 doesn't work sort of. This was a recommended calculators allowed for the exam and I am an RPN guy so, there you go.
Summary: This review is geared more toward engineers taking the FE/PE exam just FYI. I found this calculator to be adequate for taking my FE exam however did feel it could have been better. I also purchased years later the TI-30X Pro which blows this calculator out of the water as it also meets NCEES calculator standards. This only has 2 lines of text (the TI has 4 I believe). Some functions I thought were a little difficult such as rectangular to polar notation.