Comments: This is by far the best track spike I've ever worn (tried at least 5 different pairs from Brooks, Puma, and Asics over the years but never tried Nike's since didn't have good experience with them in the past until a friend highly recommended these). The fit is snug without being too tight or having uncomfortable pressure points. There is a lot of arch support. The spike is also super light. I've used them from 800m to 5000m without issue except for the very first time, left pinky toe did get "cut" by chaffing but went away after that race. They let you run fast without getting in the way. Now waiting for the Matumbo 2's to come out (same lower design but supposedly an even better upper fit with true "fly wire" wires instead of just wires glued to plastic).
From: Mike, NY, USA