I have been using similar electrodes for years. Previously, I purchased them through Amazon, and used both Healthmate Forever brand, and also cheaper generic brands. Although I had positive experiences with various brands (including generics), about a year ago, I received generic electrodes from Amazon that gave me a bad rash. It was raised, bloody, and painful, and needed to be seen by my doctor. Wanting to avoid that, I purchased from Healthmate Forever (or, at least, someone using that name). I paid about three times the price I am used to paying, because I wanted a brand I was familiar with and did not have a reaction to. To my horror, I received a generic set of electrodes drop-shipped from Amazon. They were in the exact same packaging that the problem electrodes were in a year ago! They were NOT Healthmate Forever brand (they had no brand name on the packaging). I contacted the seller via e-mail on January 28, and in nearly two weeks, have received no reply. I am currently disputing this transaction with my credit card issuer. Do not buy from this merchant. If you don't have a problem with generic brands, you can get them elsewhere for a third of the price!