The advantages claimed from running in BoMTS are that it strengthens athlete’s feet which will eventually stop them over pronating and that the athlete’s efficiency will be massively improved as they are forced to run on their forefeet. Other claims are that it lowers the cost of buying trainers, as they last longer.
However recently a number of lawsuits have been brought against the main barefoot running shoe makers such as Vibran FiveFingers over deceptive and misleading health claims  and Skechers and Reebok who settled over claims that their shoes would work your body in ways no shoes ever had before .The best report I have read on the positive and negative aspects of barefoot running was produced by the New York Times . In the report a number of studies are looked into where it was found that around 10cm cushioning used 2% less energy to run at the same speed for the same distance, compared with running with no cushioning. It also states there was a metabolic cost to running barefoot, and there was a cost to having too much cushioning.
 31/03/12 http://www.dailymail.co.uk/femail/article-2122996/Bizarre-FiveFingers-running-shoes-loved-A-list-sued-claims-increase-injury-risk.html