"I have been lookiing for a minimalist shoe like this for a while, since I switched my running to a ChiRunning technique over a year ago. Even with the modified running technique pretty solid at this point these shoes have had an impact. They are fast because of the weight, so you really have to watch the speed factor and they definitely do not provide the level of protection of other trail running shoes. I did bruise my heel on a stone about the fourth time out. Be prepared for aches in different muscles. My calves have been screaming and my feet have been adjusting to having new freedom as well, so some aches and pains there. The pain is the good kind, working new muscles, using new techniques, more focus on footfall, balance and ankle strength. The shoes fit incredibly well, I do wear a very thin running sock with them and they feel supportive to me because of the way they encase my foot. I like them well enough to be considering the leather vesion (tough glove) for more everyday wear. I have also had a lot of comments when I wear the shoes and I feel more ""nimble"" in them. I would recommend them for runners using a barefoot style of running, but you don't want to be pounding out long road miles in these shoes without a modified running technique. They have the feel of a sort of racing flat with a slight bit more protection for the sole of your foot. I am really able to lift my foot higher at the back of my stride than I have been able to in any other shoes, which is really great, watch the Kenyans nearly hit their butts with their heel during that beautiful stride. "