You are definitely correct in that it takes time to transition! I've been running in minimal shoes for quite a while now, too, but the first few weeks my calves were really sore. Now I can't imagine running in anything different! I had just switched brands from Merrell to New Balance after Merrell stopped making the style I had been running in, but the New Balance were not quite the right fit. I like working out in them otherwise, but I'm happier in the new Merrells for running. They are vegan-friendly, as well, which makes my little animal-loving heart happy. :)