I tried one once and did not like it. When sewing at machine, I prefer to set my clipper scissors right in front of the machine, which my dressmaker shears to the right of the machine. I have done that so long that when I change my behavior, I cannot find the right ones and get frustrated.
Handsewing is different. I have never set up a specific behavior as to where I put the scissors. Since I am doing a lot more hand applique and embroidery, I had to do something as I never knew where my scissors were.
I purchased a fob with a clip on it. I clip that onto my collor or shirt neckline. It has my little embroidery scissors attached. I love it. They are always there when I need them. I get so used to wearing them that I have been known to go visit my neighbor with them on. She is also a quilter, so she just laughs.