Pros:

-The song is very fitting for a dramatic fight with the Tank

-It starts out loudly and almost triumphantly, giving it a good sound that is a bit louder than regular game volume, so you'll never be overtly surprised.

-The music is dramatic enough so that when it DOES start up, you might get chills or just that "Oh... F*ck" reaction.

Cons:

It doesn't loop very well, though that's more of an issue with the music itself rather than the file.

Conclusion:

A great mod if you want your L4D2 experience to be a bit more Dramatic rather than "Balls out Action!". I highly approve.