Summary: This game is great. You are always being rewarded for your efforts. You have no problem playing solo if you like. You level, get loot and if you die the game does not ask for your soul because of it. Just repair gear. No experience loss. Regardless of class you have a choice of 1 of 3 human companions to fight with you. The game is smart and meant to entertain you, not drive you away.
Summary: It brings so much more new content and needed features (such as the Mystic) that didn't come with the vanilla version. It is a bit pricy for an expansion, but it's definitely worth it. Can't imagine playing Diablo III without this expansion.
Summary: This expansion to Diablo 3 really great, the story is depressing but adds to the theme, the adventure mode adds a whole new dimension to playing the game with more replayability and adds to playing with other players.