Bests & Worsts Reviews from Amazon

I had many, many of these throughout my home. We used this particular size under a runner in our second floor hallway. With just walking on the rug mostly two times a day, it created a waffle pattern down our hallway. Based on the purchase date, it took less than a year for that to happen. If you have hardwoods, BE VERY CAREFUL. These may pull the stain off your floors, and under sustained pressure such as under a bed leg, it may even leave a residue that you will not be able to remove. ORIGINAL REVIEW OF GORILLA PADS 1/13/19: I have (or had) many of these throughout my home, ranging from six months to two years. We have dark hardwoods throughout. This week I went to clean under our rug in our kitchen, and I noticed that there was a waffle pattern left on the floor near our stove where we always stand. The pad had pulled the top coat of our floor off, resulting in the pattern of the pad on our floor. When you look in the light, the pattern shows in the shiny v. non-shiny areas from the pulled top coat on the hardwoods. This is the actual floor stain being pulled off. It can't be washed off. After this discovery, I went around our house and removed all the pads. The runner in our hallway has also left a waffle pattern down our hall. We moved the king bed in the master, and the waffle pattern was throughout. On top of this, under the legs and the supports, the pad actually stuck. We had to scrap it off with a knife as best we could. It left a residue that we can't remove, and faint bits of the white pad. We tried all the remedies online to get it off (Dawn, WD-40, etc.). Nothing worked. Maybe these don't leave marks for some people, but it looks like they do for a faint amount including us. So, I would recommend being very caution if you have hardwoods. You are risking your floors.