I love mine. I use them when I'm embroidering, sewing, quilts, glueing, etc. Especially when I'm working with leather or any other hard to pin fabric. I also bought these plastic gripper type clamps from Harbor Freight. I can't remember what they were supposed to be for but I got them when I'm holding down a quilt, or like when I just finished a purse where the wonder clips weren't strong enough or big enough to hold the leather in place while the glue dries.
They are also great because when my grandkids come over, it keeps them entertained. They dump out the whole box and just clipping them together to make wierd things.