These were my first pair of high end shoes, and I am not disappointed in them one bit! Very aggressive. The initial break in was hell for me, taking a few weeks in total. A few weeks of bloody toes and sore, raw Achilles area on the back of my foot. I ordered them street size, 12, and at first I thought I was going to need to size up they hurt so bad (as I said, this was my first high end aggressive shoe) turns out, after the break in I returned them and sized half a size down because of too much room in the Heel area, when I jumped off a bouldering wall it would frequently make a "fart" noise.
So far, with my size 11.5's, 2 gym session in, the break in seems much easier and I can already feel the heel fitting better. Awesome shoe and I would recommend them to anyone.