- It tells a great little self-contained, ultra-focused story with a perfect ending
- It delves into the philosophy of artificial intelligence in interesting ways
- The nature of and reasoning behind Porter and Wahl's diametrically opposed views on the matter is intriguing, and Porter's musings in particular are always enjoyable to listen to, and often touching
- It's well-paced and doesn't wear out its welcome
- Its combat is more immediately and consistently enjoyable as you get access to a wide variety of plasmids, tonics, and weapons early on, and the new toys and baddies are fun
It's ideal DLC. Taken as a whole I think it's a lot more successful than either of the main Bioshock games. Similarly to some of the better New Vegas DLC like Old World Blues, the devs used the idea of post-release content to take a stab at doing something strange and creative with their setting, and it worked very well.