Pros:

- Structurally, it is very impressive. I would go as so far as to compare it to Kasperg's Kauffman House.

- Lighting is pretty good.

- Challenging gameplay and nice variety of locations to fight in.

Cons:

- The white hull like textures are a bit dull and some textures shine too much. Too much env.

- The moon looks strange. A common error among mappers of L4D.

Conclusion:

Worth a download and will be fun for many hours with friends.