I had a total knee replacements 2 years ago leaving me with one leg a 1/2 an inch longer than the other. Last year the doctor recommended I use a heel lift in my shoe. I was uncomfortable walking and these all of the time. I found American Heelers on the internet and tried one shoe out just to be sure how I would like it. It is the greatest thing I have ever done and I wish that I had found them sooner. I now have 6 pairs of shoes that have been fitted correctly for me and I will certainly use them again in the future.