I just got my first pair of Zoots (Ultra Kiawe 2.0) about two weeks ago and raced in them at Collegiate Nationals after only two runs to break them in. I raced in them two days in a row - in the Draft Legal Sprint race and in the Olympic distance race.
It should be known that I am a midfoot runner, meaning that I land on the pad of my foot (http://www.youtube.com/watch?v=Pd1QvXJS9m4) and my heel never hits the ground no matter how fast or how long I run. This strongly affects the way I experience a shoe - especially in comparison to someone who heel strikes.
Here are my thoughts on the shoe from that perspective:
In terms of sizing, they are almost the exact same width as the Adidas Boost and fit almost exactly the same… though I like a little snugger shoe for racing. That is to say: I wear a 11.5 in the Adidas Boost and a 11.0 in the Ultra Kiawe 2.0. As I said, these are my first Zoot Kiawes and I therefore have no idea how they fit compared to the 1.0s. I also have a pair in size 11.5 and these feel extremely comfortable, but my be a little big for intense racing (I’ll be testing them on a tempo run soon and will try to get back on here to say for sure). Oh… and they’re definitely a touch wider than the Sketchers GoMeb Speed 1.
In terms of their ride, the Kiawe Ultra 2.0s are pretty soft and quite well padded in the midfoot/forefoot area. They are not, as some others have noted, a firm ride if you were to compare them to the Mizuno Ronin 3.0-5.0 or the Adidas Adizero Adios 2.0. They are a little firmer than the Asics Gel-Lyte 33, which feels like running on a cloud. The Kiawe Ultra 2.0s have some pop, but not as much as you might expect from what they look like or from the fact that there’s a carbon plate in the bottom.
In terms of their performance, the Kiawe Ultra 2.0s are awesome. In the two races over this past weekend, the draft legal sprint and the olympic distance national championships, I ran best times in the Kiawes. Sure, I was tapered, but I certainly wasn’t well-rested for the olympic distance race after killing myself in the sprint. My times: 15:12 (the course was short) and 33:34.
So if you want fast shoes that are great for a midfoot strike, are crazy comfortable, and are super fast out of transition, I’d grab some Kiawe Ultra 2.0s. And the size should be pretty well equivalent to your shoe size in Asics, Adidas, and Mizuno.