I like these the best of the (admittedly few) minimalist shoes I've worn.  I've been doing barefoot style running for about 8 months now and primarily use just these or running sandals by either Luna or Invisible Shoes... or barefoot for a the last quarter mile or so.

I have normally worn size 9 in New Balance shoes for years, but found my size 9 in these were too tight (either the sizing or running in barefoot and sandals is widening my foot).  So I switched to a size 9 1/2.  Now I have two pairs.  I wear the 9 when I'm going without socks and wear the 9 1/2 with socks.  YMMV

These are flatter than many minimalist shoes which I like.  They are wider at the front arch which is key for me.

You feel the trail more under your foot than traditional running shoes, so these may not be for everyone, but that's just barefoot style.