I purchased the binding attachment for my Designer 1 and it was a complete waste of money. Not one of the salespersons could demo it. I finally made an appointment with the owner of the shop for the demo. She said she had never been able to use it with anything other than commercial bias tape and had to curve her corners because it is a hassle to get a decent mitered corner. One has to be ever vigilant to keep the bias feeding "just so" into the funnel so that it will sew evenly on both sides. In the time it takes to master all of this one could easily do a binding without this expensive attachment.