Nike Invincible 3 Heel Slipping Issues

The launch of the Nike Invincible 3 has come with a less than favorable reception because of one major issue- the fit. Many people have experienced a less than ideal heel lockdown. I too, experienced this issue at first, but was quickly resolved by tying them using a lace lock. Over time, the foam inside the heel has molded to my foot and the shoe (after about 60 miles) provides me with a great fit!