Summary: This purchase was made to replace an HP 35s that failed. The "9" key quit making positive contact and the failure was undetectable with normal key feel. I just happened to notice that sometimes my results did not pass the TLAR (That looks about right) test.
Actually I can't be comfortable using an algebraic unit
Rufus Vanacheck, Amazon
3 weeks ago
Summary: I have been using Reverse Polish Notation for years. It outdoes an algebraic calculator by orders of magnitude. Actually I can't be comfortable using an algebraic unit. You can solve equations from the inside out and it has many conversions factors ( eg: pounds to kilograms) A great device,...
Summary: I bought this calculator for my FE exam based on all the positive reviews I've read, plus RPN is fun to learn but this is the most difficult calculator I've ever used. Seriously, solving for even just roots is just insane. I tossed this in the drawer and got myself a TI-36X Pro.
but this comes pretty close. I also use an original HP 22s ...
4 weeks ago
Summary: Works well, solid feel, a bit large for pocket calculator. Nothing quite matches the old classic HP calculators for smoothness, but this comes pretty close. I also use an original HP 22s and an HP 41c.
Summary: Superset of the old HP-35 calculator. Gives me a great calculator with RPN functionality. Key placement is a bit different than the older calcs, so it takes a bit of hunting at first. Having to hit the gold button and then the C key os their one bad interface choice.