My feedback on your map.
You're eager to map, but you still need more learning of mapping.
Here is some tutorials and such, spend some time and patience. Let me give my basic steps to learn mapping.
Start from the basics, the construction of map. Once learned, study or imagine, how the halls, rooms or areas affect the gameplay, depending on game. Final step, learn the texture work, and other fine aspects of mapping (like lights, func_train or particles.)
That was bit offtopic. But to map.
As I want always to be straight, short and honest in my words, I say your map is... horrible. Yeah. It has its uses, but... It just doesn't fit so well for other maps in this category. It is just as the others say.
But don't let this reply to depress you. I have full confidence, and have some sort feeling, that you can make awesome map some day.

But you just need more practice and similar stuff. Even I am doing this all time. And it takes me too long... lol.
Btw DraZiloX: I think you got something missing. I don't got missing textures.
