First of all, for a first submission, this isn't bad! Packaging was correct, so I applaud on that for a first timer. The map looks nice, nothing looks out of place, except for the fact that you can 'access' the basement from anywhere on the outside of the building =P NOw having said that, I do have a few points of constructive criticism for future reference.

1: The first thing that really bugged me was the ambient lighting. I understand that this is a nighttime map, and it is supposed to be dark, but you really never want to use an ambient setting of 1, 1, 1. At these lower numbers, any light source that you create will almost suddenly 'stop' at its edge, rather than tapering away, which makes the darkness feel overwhelming. The darkest ambient that I ever use is 8, 8, 8. Even for really dark maps, this will give you the darkness that you desire, without making the shadows look like walls.

2: Another thing that I would do to improve this, is what I call variety. This breaks down into three sub-categories. Category 1 is geometry. There isn't much you can do for this map in the ways of geometry, seeing as to how this is an office building, and there are supposed to be multiple seperate offices. I did notice that you decided to change it up a little by adding a 'lounge' on floor 6. Category 2 is models. This map does make use of lots of different models, which I do like; however, the models do appear a bit repetitive. Like I said in category 1, this is an office building and there isn't much you can do about it. Category 3 is texturing. This is the main one that I want to talk to you about. throughout the whole buiding, you used the green carpet texture and white walls. You might want to mix it up in the future so that players do not get bored. Maybe try blue carpet and tan walls on different floors.

3: The last comment I have to make deals with realism. Even if you make a sci-fi map, you want to make it seem like that something should really be there, or have a purpose. I only say that for one reason, the basement. It feels a little weird that you can access the basement from all sides of the building, and that tho supports are completely visible.

Overall, I think this is a good first submission, and I feel you have potential! Good Luck Mapping!

its good only like an artistic map. its fine for be your first map, good job.

Well done! Realistic layout, consistent style, good use of models. Very little to complain about. (Djakk is probably right about the ambient light though.)

I think this could work as a SP map where you have to find a switch before you can advance to the next floor up the stairs. As it is it's a good map, but the layout makes for confusing gameplay.

But nice detailing, especially for a 1st map!

good map, and i found your secret room

Not bad for a first map :O

After checking out the map more properly, I also noticed that it's not a bad result for a first map.
But there are several things which could be improved:
- Use the envmap-entity for let the glass reflect the room. In this situation, it's just perfect because all of those rooms are small, so if you won't add a high radius to the envmap-entity, it will look great.
- Add more detail to the walls. They are pretty bold and boring at the moment. You could use some of the models I've posted on quadropolis, which are in the sitters modelpack (or even the monitor model).
- If you really want it to be played then I advice you to start all over from scratch again. Why? Because you would have to modify the hole building to make the flow "playable" (that you won't bump your head against ceilings, that you won't get stuck in doorways, that you can strafe freely in hallways, etc).

There isn't much further than all that to improve about, even on artistic aspect.
The lighting is kept realistic and the geometry is "ok" (could be better sometimes but oh well, it's first post so no problem).

I'll give it 4/10 for now.