Pros: I honestly don't know.
Cons: It looks like a early early alpha of a testmap. You did not bother to include any kind of lighting in it. You did not bother to put proper textures in it. The whole map is a bunch of blocks or crate-looking objects.
This is seriously the WORST map I've seen in a long ****ing time.
And I'm serious.
Improvements: Add light, textures, anything that could possibly make this map look like SOMETHING.
Right now, it looks like... I'm not sure you wanna know what I think it looks like.
Whoever rated this 10/10 is out of their freaking mind. That was just a cheap stunt to make people look at this horrible map. I don't even know why someone would bother to bring attention to this, as I'm sure it'll get deleted off the site in not too long.
Edit: I'm not sure why I even bothered approving this.