Wonderful story, awesome and creepy and mysterious and beautyful - and complete DIFFERENT than the main game and therefore a complete new style of Witcher gameplay.
It´s like ghost stories and exploring other dimensions making pacts with the devil - everything is highly interesting and truly epic stuff.
And sometimes the DLC is like Silent Hill.
In my opinion the DLC is way more interesting and offers so much more than "slay some superevil supervillain".
The Wild Hunt itself, if you meet these guys in person, well they are not that interesting in the main game because they are not sadistic and evil and special and weird enough. All the other characters and enemys related to the Wild Hunt like "The Crowns" and the Allgod and the funny and strange NPC`s are way more fascinating and uniquè than just slaying some black knights
But in the DLC the endboss it truly interesting and uniquè and fascinating and the story leading to him is pure survival horror Gold and five stars gameplay.
And you get truly impressive loot from the HoS, for example the Viper Sword beautyfully crafted witcher gear, this new Ophir saber-style sword, if you pact with the Devil you will get a complete new zombie Roach similiar to this "Bog Unicorn" in Dragon Age Inquisition but way better and cooler - or otherwise a beautyful red glowing magic saber.... What a wonderful game that is adding so much loot and treasure stuff to the main game
The story is awesome and highly interesting, the treasures and loots are wonderful and truly uniquè and way beyond some "single new armor", this DLC is just perfect. 10/10.