I have purchased many of these carpet pads from Overstock and use them throughout my home. I love that they are reversible---some of mine were purchased to go over wall to wall carpeting and now are used over our new hard wood flooring---a great buy for that reason alone. They are thick--they can be cut to size however with good scissors---and not only stay in place but add a layer of softness to the area carpet they are under. The price is amazing and the delivery was quick.
Bought four of these to go with our Safavieh fine Sisal runners. They were just the right amount undersized on the width not to require trimming. Length had to be trimmed a couple inches. The sticky side sticks to our hardwood floor quite well, and the runners stay in place. No complaints.
This rug pad is thinner than it appeared in the photos. Also the layer of rubber on the bottom is very flexible instead of firm like other rug pads I have purchased. I expected it to be very firm but instead the overall product is quite flexible but it works.