Pros: A nice looking map with some interesting geometry and a fun layout
Cons: some of the textures are badly aligned and those ladders look terrible. Lighting is also a bit bland
Improvements: spend some time going over your map and fixing up the textures (mainly the hand rails).
Change the colours of your lights to something other than white i don't think white works too well with the the textures.
The bottom floor feels too open in some area
(nitpick more than crit)
Notes: overall good job