This is the thickest rug pad I had ever seen.  We purchased an outdoor area rug for our living room so I thought it would be smart to go big on the pad so it would feel more like an indoor rug under your feet.  It was so thick the area rug looked like it was falling off a cliff.  I spent a pretty penny on it and was so frustrated that I threw it away.

Pros: if you're looking for REALLY think rug padding, this is for you
Cons: Too thick, can't trim to fit under rug