I have 2 friends that have had them for a number of years. They are both avid quilters, knitters and are very crafty-talented. They both say they are quite complicated and you have to keep a sharp eye when making socks. And you must be a competent knitter because you have to add when doing the heel, toe, etc. One of the gals said she had hers about 1 1/2 years before she could turn out a really good pair of socks. They turn out beautiful wool socks, they sell them for 20-30 dollars depending on the market but they last for years - I have 3 pairs and wear them constantly. One of the gals is going to buy a new one and sell her vintage machine, she thinks it will run better and won't need as much repair.