The Gravity 13's are my second pair of Newton Shoes. I haven't ran in a cushioned shoes for years, but these are still very responsive.
The toe box is just wide enough, a couple of mm more and it would be adeal for me. I don't like the heal collar, it's a bit too stiff and i can feel it pressing against my achiles, not enough to rub, but it's there, and it's off putting.
Still... you can feel the shoe wants to go fast and it really can handle tempo and fast intervals with ease. It's also fine on slower long runs. A great all round training shoe.
