I have the Merrell Trail Glove 2 bought by research and the recommendation of a friend, as my Nike Free so slowly lose their profile and the current models are no longer to be so well made. Furthermore, the Trail Glove has a different concept. Here the entire foot is flat in the shoe, just like bare feet. The Nike Free compared the heel is padded thick, so that a "wedge" created and you always "down" is in the shoe. When walking you do not notice but which actually, once you go faster you will but then quickly get used and not roll your foot over the heel, but end up with the front foot. Since then the muscles should begin slowly and carefully be loaded completely different one really. My first lap was 3.5 km and I had the next two days worst sore muscles! During these days, I've read that Merrell suggests with a mile (~ 1.6 km) to start and to weekly increase by about 10%. Who's command of English can get information directly from the manufacturer: [...] From feeling in the shoe Trail Glove 2 are great, you can even go barefoot jogging is without about aufzuschürfen or anything else unpleasant to remember. The Vibrams sole is incredibly handy, only caution on wet tiles, somewhere is also here closing times. So rough terrain are no problem, but woe to you go to the supermarket! ; O)