I use them all the time! Aren't they great!
I had to start using them in this past year when I injured 2 disks in my neck because I didn't have the strength to hold the ruler like I once did. But I'm not the type to let much stop me when I want to do something, so I just grabbed a few out of my tool box (I'm the maintenance woman around here too) and kept on cutting. LOL
Oh they are also great to help hold up a quilt for taking pictures too. I'm sure if you think about it, you can find even more uses for these most handy items. While you're at it, look in there (tool box) and you'll find a few more very handy items.