DM-15

I am a RPN person and always will be. This little powerhouse gets the job done and is easy to bring everywhere. The keyboard takes some getting used to, but not unlike the credit card calculators we all remember from the 80's!

I bought this item and its full size model (DM15L). Their functionalities are equal as advertised. However their quality as hardware was not.I am satisfied with the bigger brother, it is even better than the original HP in some points. But this one has substantially poor design. Mine appeared with the front panel partially detached (there was a gap between them) and some keys did not work. It seems that the main board warped slightly and was not attached to the front panel securely. So I tried to fix it by bending the board backwards and managed to improve a little, but some keys still need to be pressed so hard to respond. I liked the concept, but it did not meet my high expectations...

Do not purchase this item. The keyboard quality is very poor and requires a very hard press on the buttons.

By looking at the picture of the calculator you may be led to believe that the key are like the keys in a HP15C calculator, just smaller, They are not. The key pad is just a picture of the HP15C calculator key pad. Although the key pad is somewhat three dimensional there are no actual keys, just locations to press for the function. The "keys" have tactile feedback but that doesn't mean that when you get the feedback the display actually records the key you pressed. Watch out for that. You may press a "3", for example, and you will get tactile feedback, but the "3" may not actually show up in the display. The pouch that came with the calculator was silver and looked like something your pre-teen daughter might have in her purse. But I guess that doesn't matter because the calculator would not fit in the pouch anyway. I tried forcing the calculator into the pouch and was only able to force it in about 3/4th of the way. Useless and ugly. So, is it worth the $100? I'm not sure. I will probably keep it but I'm disappointed.12-21-15 The seller pointed out that the calculator case was just included as a freebie but offered to replace it with a nice leather case. I have received the new case and it is very good and much appreciated.

It's great! I bought this gadget as a replacement of the HP 15C anniversary edition & I'm very impressed with its performance. It's small, it's solid, it's compact and not so expensive, it's RPN. Take care that the housing could look some crafted but that gives it more attractive! Good choice for the price.

I love it! This is my new friend. I'm a long time HP RPN fan and have always loved my 15C but this allows me to really take it anywhere. And that means you'll use it more and sharpen your skills (if you're a real engineer or math nut). Thank you Swiss Micros! Can't wait to get a 41 next. On small vs. large, if you have large hands, get the larger one... else, the small is super portable and that really adds value for me. Awesome!

I purchased my very first HP 15C at the now defunct Educalc. I purchased my second HP15C for the now defunct Fedco. I love my HP 15C calculators to death, having carried one everyday to and from work for years until it fell to the ground and broke. I then broke out (pun intended) the second one and carried that one for many years until replaced by the HP 48GX. Now, SwissMicros, don't be scared by the fact the my first two HP 15C calculators that the company's are now defunct. Both were in business for many years, Educalc was as I understand was badly mismanaged. And Fedco fell victim to its competition. You have a nitch market with best I can tell NO COMPETITION. I wish SwissMicros all the success and prosperity. After all, where am I going to continue to buy my HP clone calculators. Now to the rating, the DM 15 is AWESOME. Its like going back in time and being able to get back my favorite classic HP 15C calculator at a price that is reasonable. I realize this review is for the DM15, but I also own the DM41 which I also carry in my pocket. So to sum it up, I carry two calculators from the "way back machine", My DM 15 and My DM 41 in my pocket everywhere I go. I am once again in geek heaven, minus the pocket protector.

The calculator arrived with a completely exhausted battery without any documnetation. I had to visit manufacturer's home page to figure out more about calculator and battery. Ater replacing with a new CR2032, I found that the calculator works fine.The calculator is "relatively" well made if you compare with documents, and the size of this calculator is much smaller than that of hp 11. I am certain that you would be disappointed if you expect the same quality made by HP.