There is a defect with this particular model of mizunos, has anyone else experienced this? I am a distance runner and log about 25 miles weekly, more during marathon training. This is the second pair I have owned of this model (Inspire 11) and after two months there are holes on both sides of the toe box. I am processing a return/refund but it's disappointing to not see these shoes last 6 months like they normally do. Maybe mizuno 12 will be more sturdy and reliable.