User blog comment:JAlbor/Dawnguard: What Everyone Should Know/@comment-1080767-20120628025347

It is the most detailed, intense content in all of Skyrim. Worth every penny. Cool things include:

-Puzzles everywhere!

-Soul Cairn is like a condensed Blackreach that you can actually see in

-Forgotten Vale feels so original and refreshing and stress-free, like a really big Eldergleam Sanctuary

-Finally, a character with some... well, character. You kind of have to relate with Serana and feel empathy

-Boss fights!

-Every location and every fight is unique, and Bethesda has been sure to include all the new content as frequently as possible, in a good way

-Some of the best items in the game come from this expansion. A hammer that plants runes, a bow that shoots extremely fast, a shield that bashes enemies into an ethereal, harmless state, a circlet that gives two Standing Stone effects, crossbows that ignore half of a target's armour resistance rating, and that's just the enchanted/unique stuff off the top of my mind

-A living window (well, three of them) into the Second Era or before