As I made my ascent, I was a bit surprised by how heavy they felt. Now "heavy" is all relative but at 8.9 ounces, I felt every one of those ounces. When doing long, steady climbs the last thing I want is to notice the weight of my feet. Also, they felt a bit "foamy" on the sole - noticeably more so than my MT101s or Racer ST5's (my other two favorite trail shoes). On ascents especially, I like to be able to connect with the ground which ironically with their trail version of the "PureConnects" I wish I was able to do more of.
The Pure Grits really shined on the descent however. The padded soles really absorbed the pounding and rocks well and the "grip" of the soles were evident. I was able to rock the downhills (or about as much as I'm able to right now) without really thinking about feet protection and was instead able to focus on footing.
Overall, these are really solid trail shoes and I will definitely include them in my rotation. However, I think they will be better served for the longer stuff (20+ miles) than shorter jaunts in the dirt.