I started running on the five fingers and loved them, but I do a lot of trail running so I started looking for a show with a thicker sole but still maintaining the minimalist feel. I found these on line and loved them! I have put about 200 miles on them and no issues they are the best shoe I have run with. The have a good free feeling to them and they are very light on my feet. I am personally not picky about whether or not they are snug like the five fingers I like that they feel like wearing a slipper. I am usually a 9.5 and that is what I purchased and I had no issues with the sizing they fit very nicely.