I used this shoe and they were great. Nice and light but they did pinch my 4rth toe and my foot is narrow . . . Wasn't bad though. Can't beat the comfort but the durability is low.
Im using the nike balistec 2.3's and I think the nikes are even better / on sale. Just as comfortable with 6 month durability guarantee. There is a thread about them and nobody says anything negative about them.