Left 4 Dead's "The Sacrfice" DLC Trailer

The Sacrifice will be available next Tuesday (Oct 5.) for 560 Microsoft Points and free to PC and MAC users. The DLC is for both Left 4 Dead and Left 4 Dead 2. I'll get it but I won't be playing it anytime soon. I'll be too busy playing NBA 2K11 so let me know how it is!