Benjamin G.wrote a review of La Sportiva Vertical K Trail Running Shoe - Men's on September 7, 2012
Let me preface this with the fact that I live in the southwest where bullet proof soil and dry conditions mean deep tread does nothing to enhance grip ... if I lived in a muddy place I might worry about grip.
Anyways these shoes are very comfortable and insanely light.
I ordered a half size up and that was perfect. Slightly warmer than expected due to the fact that the top doesn't have any mesh.
The shoes collapse down to just the soles so they're very compact. These shoes are great for squeezing into carry-ons ... but they're happiest pretending their not on your feet ... every once and a while I have to check to make sure they're still there. Plenty of support for this category.