Very geometrical, seems to take a lot of inspiration from Bungie M1 maps (I was reminded of What Goes Up, and Bob-B-Q, for example). Great flow, and the single 1x recharger provides just enough temptation to get your buddies blown away.
Nice combo of open and closed spaces. Symmetrical layout with different features in each section (which makes for some disorientation). Textures are used well for differentiation, but these become useless if you find the night vision powerup.