I've bought this as a replacement for my old 20-bucks pair from Walmart as one day found both soles cracked and decided to  buy something better this time. Considering the amount of good reviews this model seemed the right choice. Used it for training sessions on a bike - felt neither bad not good, just ok. It remained this way until I actually tried them for running. Here's where the nightmare begins. After the first 1-hour running I found the skin erased on both heels. Ok, I was stupid enough to put a patch on damaged places and repeat the same training the other day. This time I found one of my white socks colored in red with blood. Have no wish to perform further experiments so far. Since the size feels right for me must be something about the shoe construction.