Just "ok".
My first complaint is that this rug pad was not actually 5'8"... it was more like 5 1/2" x 8 1/2", so I had to cut it myself to fit under the rug I intended it for, which was kinda a pain... Second, the rug can move around pretty easily and I was hoping for it to hold it completely still, since it's under a rug in a children's toy room. The rug doesn't SLIDE around, so it's "fine", but it can easily be pushed (3 year old child actually pushed it a good 2 feet just with her hands), which causes it to bunch up underneath the rug. So, this would probably be fine in an area that is not high traffic. I'll end up replacing it sooner or later, but for the money, I'd say it's just OK.