This is my second pair of Jambu barefoot shoes and I'll keep buying more as long as they make 'em! Judging from the other reviews, some people have problems with the fit - I find they do fit somewhat differently than other shoes.  The barefoot concept means your feet are protected from the outdoors, yet the soles are thin and flexible enough that your brain is still getting good feedback about the terrain so you adjust your stride accordingly.  In order for this to work the fit must be fairly close - your toes should go right to the end of the shoe. The top line of the shoe is adjustable using a stretchy bungee-type device, but if the shoe is fitted as noted above, the wearer really shouldn't have to cinch it too tight.  Moderate arch support is provided through interior shaping/stitching as well as a thin, padded insole.  I've struggled with plantar fasciitis and a history of ankle injuries; there seem to be two schools of thought about how to address these problems with footwear. One is to wear cushier, clunkier shoes with a lot of heel and arch padding to protect the foot. The second approach is barefoot technology - that your feet and brain working together in a natural stride will actually self-correct some of the foot problems we've developed in modern society.  Having tried both approaches, I'm going with barefoot technology.