This is the nicest cushioniest rug pad I have ever used.  I listened to other reviewers and bought a slightly smaller size than my rug since others were complaining the rug pad is so thick you can see it if it's the same size as the rug.  So I bought an 8x12 for a 9x13 rug and I wish I hadn't.  I would rather have bought the 9x13 and cut it down an inch or two on all sides to hide the pad rather than have the change in elevation several inches in.  I think it depends on the type of rug you're buying this pad for.  Our rug is very thin and floppy so it is very noticeable where the rug pad is and creates a tripping hazard.  Would probably be fine if we had a thick rug that's already quite stiff so it had a gentle upwards slope rather than a clearly delineated angled bump.