I gave this rug pad a challenge: a very thin 5x8 at the top of our stairs, which gets a ton of traffic and is constantly sliding around on the floor.  We have 1/4" rug pads on the other rugs in my home, and this one somehow feels softer -- my 4 year old immediately demanded to know why the rug was so soft.  The little nubbly bits on the bottom have completely eliminated the sliding.  The thinness is great, too, because even though the rug itself is very thin, you can barely see the change in height where the rug pad tucks slightly under the edges (I ordered a 5x7 pad, having forgotten we actually have a 5x8 rug...).  Really impressed. ETA: a week later, I still get surprised at the cushioning, and my kids have been running around like maniacs and the pad hasn't budged.  Success!!