An excellent expansion to one of the Best games ever.
Welcome to the Shivering Isles.
After a stunning opening scene that transports you to the first area of the massive landmass you see a swampy and dark environment. After walking to the first small town you learn of a Gatekeeper who manages to keep all adventurers out of the Shivering Isles unless deemed worthy. You earn the title of worthiness by killing the beast. Here you start to the new creative quest choices. To kill the keeper you can gather it's creators tears which it is vulnerable to or shoot bone arrows of it's predecessor. Shivering Isles expansion pack features multiple choices in quests. After all that you are transported to Sheogarath the Prince of Madness's realm, the Shivering Isles. You'll first notice depending on which door you chose that the game has an improvement in graphics even though it's based on a a year old engine. You may see a bright colorful almost blinding environment or a dark swampy foggy environment. The new creatures you will encounter to recieve your first quest from Sheogorath show Bethesda put some time to the creatures creation. Some creatures regain hp while in the water while other's only appear under certain circumstances. The new environments look great and help blend in with the creatures.
On the way to meet Sheogorath in his capital city you may have already(depending on which door you chose earlier) Dark Seducers or Golden Saints. These are the guards of the 2 sides of the Shivering Isles. You may have also encountered cooky citizens. The dialogue in the Shivering Isles and new sounds are much better than boring old Cyrodiil. People here have something interesting and funny to say. This also helps the questlines as the later quests are fetch quests.
The multiple choices in quests,entertaining dialogue and sounds, new creatures, new and still excellent looking graphics aren't all this already great expansion has to offer. What expansion is good if you aren't supplied new items to loot and look for. Some of the armor and weapon designs are creative, intuitive, if not downright funny(you'll see what I mean). You also get to create your own armor. There's 2 kinds of ores for 2 kinds of armor. Amber for Light and Madness for Heavy. Both look real nice when decked out on the fullset.
So if your getting tired of Cyrodiil or need a plain RPG fix this is the game for you