This is an absolutely awesome shoe.  I purchased it because it was low and good for the cardio kickboxing and martial arts workouts in which I participate.
The reviews I read on this say that you should get it a half inch larger than your size but realistically if you have thicker workout socks you should go with a full size larger.
My socks are thin so a 10.5 foot fits nice and snuggly in a size 11.