I'm currently comparing various Inov-8 shoes, the 315, Flyroc 310, Terroc 330 and Roclite 295. I'm finding the 315 toebox to be a little too narrow and not tall enough for my fat and tall toes. the 330 and the 295 toeboxes are much more spacious. They also have a somewhat similar underfoot feel to the 315's, whereas the flyrocs are much flatter underfoot. But I've only worn them around my apt so far.