I purchased a pair of the Mojave pant a few months ago. The fit a little big, but they are adjustable. I might go down a size next time. The venting is ok, no better than the Joe Rockect pants I was using. The belts in the back are useful for attaching the straps from my JR mesh jacket, otherwise there isn't much to secure them to a jacket. Also the padding is thin, but I also purchased Klim knee pads and a back pad and the material seems first rate on those. The knee pads hang low, they are not adjustable, and I have to tuck them into my boots to keep them in place.
So they have some issues, but the material is superior to my JR pants so I wear them all the time now. I also like the orange color. It almost matches the JR reflective vest, which runs a little big, but is nice. They are now the minimum requirement in mesh gear for me, but they do not fit as well as JR gear.