Bests & Worsts Reviews from Amazon

This is a very good product because the raise height is adjustable and the raisers are wide enough to be stable. The height is simply based on how many you stack on top of each other. The square design is more stable than the circle design and interlocks as more are stacked together. The rubber insert on the bottom prevents the raisers from slipping but I'm not sure if it would completely prevent scratching on a wood floor (ours are on carpet) since it doesn't cover the entire bottom. The clear color is inconspicuous. On the top are universal grooves so that they work well under small or large wheeled bed frames and the round bottoms of sofas and bed frames. We have the cirle ones, too, but can only use them with round bed frame supports because the wheeled supports keep slipping off. The product is made of solid, clear plastic and has held up well so far. Each raiser is good for about a 1-1/4" raise. Hope this helps.