I have two of these - one can nest inside the other, if you want it to.
It works a little better than the quilt halo (which for me was a *complete* waste of time) but honestly, I do much better with my rubberized spandex gloves. (or even my bare hands)
Both of these kinds of quilting "frames" require you to make a repetitive or continuous pinching motion - this is so hard on your hands and wrists!
Plus, you have to keep picking up the frame and placing it somewhere else - it blocks your vision of where you need to go next, so it interrupts the "flow" of designs.
It's easier on the hands than the halo because it's thicker, (so you don't have to grip so small) and it's got a cut-out in the back so that you can manuever it around the presser foot more easily than the halo.
But I tried and tried and couldn't get around the inconveniences of using this kind of thing. I keep asking myself, what exactly are these things supposed to do that gloved hands can't do?
When I first got into quilting, I tried a lot of things that were supposed to help me do beautiful FMQ more easily, but very few of them really work as well as I wanted them to. (I haven't found a magic substitute for putting in the work, darn it! ;) )