If you mean the suction cup handle thingy then yes, I did get one of these when I started quilting but I got a klutz glove as well because well, I am a klutz.
I found the handle a bit awkward and I had a hard time keeping the long ruler from shifting on the fabric. The suction cups hold fine but you can't keep pressure along the length of the ruler. I never cut my fingers though.
I liked the klutz glove much better,
https://www.quiltingcompany.com/store/klutz-glove-med . it has grip dots on the hand so that it holds the ruler and you can walk your fingers along the length of the ruler so you don't get shifting.
Safe quilting.