I purchased a pair of red patent simple pumps a few months ago, I wore them a few times and although my feet never hurt after wearing these shoes, I noticed that my back was always in pain after the few times that I wore them. I noticed the back pain because I never have back pain and was suprised to experience from such a comfortable shoe like the simple pump. Anyway, today I was wearing these shoes and decided to get the heel lifts changed since I was walking past my favorite shoe repair shop during lunch. I gave my shoes to the cobbler and he informed me that the heel heights were different on each shoe, he showed me the heels back to back and there was a noticeable difference, it looked like a .5" difference at least. I couldn't believe it! So I had the heel lifts replaced and I ran over to the store that I purchased these shoes from. I explained the situation and they offered me a refund since that shoe is long sold out. The SA mentioned to me that this has been an issue with other CL shoes, so ladies before you purchase your next pair of CLs, be sure to check that the heels are the same height. Now I am bummed because that was my only pair of red shoes and I didn't really notice anything else that I liked in red. Hopefully I will find the red patent simple pump next spring.