They are super comfortable and look great but the material they use on the outsole is terrible. There is absolutely no grip with these. I can do a Risky Business slide with them. It's like the "rubber" was made out of recycled legos. Hardwood floors, tile, or even smooth concrete is too much for these. Another reviewer complained about squeaking. I can say I have not experienced this but I kind of wish I did because it'd be a sign that the "rubber" had some semblance of traction on the floor.