I bought iwalk to help me get back on to my feet after having surgery, Although I followed instructions i found the iwalk very difficult to walk on. I noticed after walking, my leg just below the knee was very red due to pressure. This worried me as DVT is a real issues in ankle - leg surgery. The fact is iwalk really should not be used when your ankle and leg is swelled after surgery, putting pressure below the knee is really not advisable and will cause further complications. Its a shame iwalk do not make this clear in its advertisements and literature. It is 2 weeks since my surgery and I am still waiting for the tender swelling to go down, then maybe I will try the iwalk again. So for the moment my £165 iwalk is in the corner of the living room mot used.