The right exit out the box pile feels awkward. You either have to hit it really slow to hit the ramp at the bottom, or really fast to jump over the boxes. If you're anywhere in between, you usually get stopped/slowed down by the boxes a lot, and it's not fun.
Play tested it with a few people, and a couple were complaining about low framerate. I notice you have a bunch of func_walls in there... those kind of give you false lower r_speeds, as I don't think the func_walls are actually counted toward the r_speeds. Also, you certainly should not have large sections of func_wall like the rock wall area in base. All that does is introduce overdraw (it draws the the func_wall and the stuff behind it as well). Another side effect of the func_wall is that you lose the surface-specific sound effects, so you don't hear the wood/metal/etc. impacts.
Overall, I it plays pretty well, though.
On a side note, this map really makes me want to work on a new light program to properly handle ambient occlusion with sky lighting.
