@Ingmar
I am someone who has been mostly unimpressed by most DLC. I feel most game makers have said what they have to say in the main game 99% of the time.
Left Behind was something else though. Played it back to back in one sitting. I was amazed at how the creators were able to bring across so much in such an economical and subtle way. The characters and acting were again top notch and Ellie is now one of my all time favorite game characters
Maybe best story DLC ever.