Picked up some old leather chairs from craigslist for my dining table. The felt is nice and thick and feels sturdy. I like that it's a little flared, so it will resist getting pushed off center. My chairs glide on hardwood without fear of scratching.
The adhesives are still intact after a month. A little more adhesive would be better, but we'll see if they stay put. Can be used on multiple items.
Just put them on my bed legs, kitchen chairs and trampoline exerciser. Makes the scratchy noise disappear. Gentle on our newly refinished hardwood floors.