The shoes could be worn for longer periods if the strap across the toes did not cut across so low on the foot I have tightened up the strap as much as it will go, if I loosen it, the strap rubs the foot and is uncomfortable.  I have purchased some tape and am going to try and tape the area under the strap.  I love the support of the rest of the shoe but am looking for a solution for the rub.