I caught on to working it in about 5 minutes. I have to use my mind to make the missing wrist move up and down, which in turn makes my forearm muscles flex. Sensors set on top of the muscles and when I flex the wrist up, the hand opens, when I flex the wrist down, the hand closes. The feel is nothing like a natural hand. I am going to get the skin glove but it takes a few monthe to make. They say it will look just like my other hand. The iLimb comes with a 3 year upgrade contract, so for the next 3 years I can upgrade free to the newest technology, who knows where they will be in 3 years!