This is the DLC where Adam is on the ship. I played it and thought the level design was better than anything included in the stock game, and makes for a more difficult experience. You dont have any augs when this starts out, but you get them early on, giving you a chance to build your Adam regardless of how he was in your stock game.
I recommend playing this stealth the first time. It seems to be designed for a difficult stealth experience.
Well, I was hoping someone would comment on the quality of the DLC. I'll probably pull the trigger on the main game, but is the all the dlc worth it? Some of it? None?