I have nothing to do with the sale of this product, but I am a satisfied user. I work with quite a few nurses who had these funny looking shoes with a spring in the heel. Several said they saved their careers, so I was willing to try anything. I had been buying "good" shoes in the $80 range and still having foot and back pain at the end (or beginning) of each shift. The ones I have were $200 but I am told they should last 5-6 years. I have had them about a month now and they really do make a difference. I work 12 hour shifts in a very busy ER. I have been wearing a pedometer lately, and it shows I walk close to 10 miles per shift! As a 51 year old with a few extra pounds, I needed all the help I could get!! You may want to check out their site. I got mine locally and I was quite impressed with the salesperson. She worked with me about an hour getting them just right, watched me walk for a long while and made adjustments.
I don't normally endorse particular products and I hope this reply doesn't get pulled because of it, but they really do make a difference. They take a little getting use to, because you are suddenly taller, but they are very stable and you really have a "spring in your step". I work with one lady who has 4 pair, 2 for work and 2 casual. Check it out.