We have received hundreds of positive responses from very satisfied customers:

Mr. Azama of Japan Jewelers Association in Tokyo, wrote in an article on www.ganoskin.com:

I see in the last digest that many are still using the black stone, gold needle points and aqua regia to test for karat quality. It is hazardous, time consuming, and not really portable. There have been a few gold testers that work on battery with an acid jelly and are fairly expensive. I would like to recommend to all, the Golden Touch gold tester that is made in the USA. It is portable (fits in your coat pocket), safe, reliable, and cheap (half the price of the jelly type). It is capable of reading gold from 24 karats down to 6 karats. It will easily identify gold plated items without the need to file or scrape the item. It is easy to use: click it on to start, clip on your item to the alligator clip, drag the item across the magical paper and see the color quality of the marking. No clean up. No damage to the item. The magic paper can be used over and over, though the unit comes with a package of 50 sheets. It comes with a more detailed instruction. It sells in Japan for [$120], due to the expensive freight charges, duty, and the commodity tax. For those in the U.S., figure you should be able to get it for near half the price here. Been using it for the past year and have not used more than ten sheets...and all ten are still usable. Min Azama Tokyo.

I am very happy to tell anyone that the machine of yours is a wonderful tool. It is a vast improvement over using acid & needles. I am 100% confident & happy with my purchase of the Golden Touch Electronic Gold Tester. It is SAFE, FAST, ACCURATE, PORTABLE, USER FRIENDLY and has already paid for itself the first day I received it.
Very sincere thanks,
K. H. R.