UPDATE: I just got to 500 miles with the shoes, and both shoes have blow-outs on both sides. I've been really hard on them, but i'm a little disappointed that they are breaking down so quickly. I plan on buying another pair though.
These bad boys are awesome. Flat out, hands down, freaking amazing. They are really lite, flexible, and sensitive. I've worn them on short runs to 50 milers. They work well on trails and roads.
If you want the specs, look at the website. Know that the show has a 6mm heel-toe-drop, it has minimal cushioning, no stability control. this is a fairly minimal shoe.
I've logged a lot of miles in the shoe, and it holds up really well. I put in about 400 miles, then ran a 50 miler and I noticed at the end that there was a little blow out around the toe box.
The grip is still in really good shape, despite it being sticky-rubber. I've logged about 250 miles on roads, so it doesn't wear out very quickly.