Design: The design is repetitive and bland, what could have made it a lot better was making it less copied and pasted over and over. I've tried the map, and every time I turn around I can see the same 3 boxes that I saw when I was looking the other way.
Looks: The looks aren't that good, compared to other dev_ maps that is. It could have been better if you mixed the textures up a little, instead of just the default orange and gray you get with Source SDK. You can find a lot more dev_ textures from here textures/707.
Gameplay: The gameplay is dull, it's very cramp and small, so if you're playing with Bots (or players), you can find yourself meeting more than what is enjoyable. You barley have any time to reload before you meet another person.
Side notes: You can use the entity "Light_environment" to brighten the place up, here's a explanation on it if you don't quite understand the use of this entity.