I saw these advertised on TV, on a fitness channel and in a magazine I subscribe to. I couldn't wait to get these home and try them. I bought the ones for carpet. I tried them on a new carpet, and really didn't glide anywhere. Then I waited a few days and tried them in another room, still didn't glide. I finally just put them away. I buy a lot of fitness products, and this was the most disapppointing one that I have ever purchased.