These things are this shorts I've been looking for! I just spent a long weekend pedaling around NE Utah in the heat, dust, cactus, slick rock and mosquitoes and these things were killer! They breathe exceptionally well, the fit is a great compromise between full on DH and weight weenie shorts, they stretch and move very well, they weight is quite light and the included chamois liner is actually really good. The fabric held up to some gnarly crashes into some cactus and rocks - much better than I thought. The length is about perfect and the pockets are super deep so nothing will fall out. The openings will also fit over you knee pads.
The only issue I have found is that because the pockets are so deep, there's a lot of material that pulls out when retrieving gear out of your pockets. Tacking these to the inside of the short would help. But given how awesome these are, no worries.