Summary: Being an HP user since 1975, I was glad to get another since my 48 started acting up. I love the calculator except for one big change in key placement. Why did the 'enter' key move to where TI puts their equal key? My finger automatically moves to the old location.
Summary: Most people shopping for this will most likely be comparing it to the TI-89. Having used both now, I can say there are plenty of differences, but neither is better than the other. Pros: Inexpensive, Equation Writer, RPN Cons: Unintuitive in some areas, less support, shorter battery life Overall, the HP-50g is a better tool for long term use. The equation writing function as well as RPN allow me to enter things quickly and efficiently and perform calculations smoothly.
Summary: I have owned HP calculators for many years now, my first, an HP41, purchased in 1980. My present calculator, an HP48 had failed, or so I thought, so I bemoaned the fact that I would need a replacement and I heard a rumor that HP calculators were not what they used to be. I wanted only an rpn calculator and heard a rumor to my horror that HP calculators were no longer rpn! I was surprised that this calculator supported both algebraic and rpn entry with a mode toggle.
Summary: This was to replace my old HP15C. I love RPN and would never go back. I am having fun programming it, but would have had great difficulty doing this based solely on the HP documentation. Fortunately, there are plenty of resources on the internet that I used to get up to speed. Wish I would have checked out the Prime before purchasing this. The Prime looks much more user friendly and has better PC tools for programming.