I have purchased and received the iwalk-free device in anticipation of ankle joint replacement surgery in two weeks. I have practiced with it and think it will be better than alternative methods. I fell over in my first practice session because I didn't have it adjusted high enough and didn't keep it out to the side slightly. Once you go over center, you might as well sit down 'cause you are going to tumble! After 15 minutes of practice I gained enough confidence to give it a thumbs up.
It's a little difficult going down stairs as your foot hits the next step up unless you sort of turn sideways. Up is much easier. Both directions are much more manageable than traditional crutches. I use the handrail so it's not hands-free on stairs.
I've used it for about half a day a few times and the going is slow. But it is better than a wheel chair or roll-about for around the house. For short trips (like to the bathroom) regular crutches may be easier since putting the iwalk-free on and off takes a minute or so.
I tried putting a golf ball around the living room and found the balance a little tricky. I find it hard to believe someone hit a hole-in-one as their advertisement claims. Seems like too much risk to take a reasonable swing at a golf ball. Maybe after six weeks I'll feel the need!
I plan on walking out of the hospital after surgery - well at least showing the doctor I can manage to get around.