The pass contains the following packs: Royal Court, Northern Lords, and Fate of Iberia. None of them are particularly essential in themselves, unless you're specifically interested in additions they offer. Royal Court makes your feudal court more involved and interesting. Northern Lords lets you play as various viking rulers. Fate of Iberia improves and expands the Iberian peninsula and all the various local faction variants therein. Not a bad pack and relatively decently priced compared to buying the packs individually, especially on sale.

With this pass you have most of the DLC at the start, which changes the game depending on where you start. With new game mechanics etc.

Simply perfect and without fault. This came will only get better with time