I just got them and put them on and after a few steps on the hardwood floor I started sliding around. Adhesion to hardwood and tile surfaces is weak. I'm a heavy guy and I walk a lot, so I wear out the soles of a regular pair of shoes in 3-4 months. I can say they probably won't hold me. 2. The soles feel brittle and soft. Like slippers. However, memory foam is comfortable.