Looks pretty good, the geometry looks a bit rough, maybe that's because you don't have anti aliasing on :P. I think what you need to work on here is add subtle detail to the walls and ceilings to give them a bit more depth because at the moment, it looks pretty flat and I am seeing many opportunities to add depth to the walls and ceilings, its one thing to have the fancy curves and angular geometry, but that can still look flat and dull. I think if you did that, this map would look much better.
I also think it would look nice to add fog in the map, nothing heavy, but maybe a pale white-green colour would look nice, you could even go for pale light blue, something to match the texture colours in this map.
Might also want to add a couple of props, I think some railings would look nice, but don't use anything that doesn't fit in with the maps theme, such as wooden crates.
Lighting could use a bit of tweaking (always remember that lighting is VERY important- a poorly/rushed lighting in a map defiantly detracts from a map), but I think we can get to the lighting later, just work on the subtle detail, that extra bit of trim and depth to the level because its lookin kind of flat at the moment.
Keep us updated!
