Excellent calculator, very clear displays and well implimented themes. I especially like the paper tape as with these small keys it is easily possible to make a mistake, and the ability to email the paper tape as a hard record. Easily customisable with an excellent selection of options and themes. Can be RPN or a normal keyboard. Excellent value considering that to buy a calculator like this would be around $60 to $100+ The built in conversions are just icing on the cake. Recommended