Shivering Isles looks fantastic and runs fairly well most of the time, although the stuttering frame rate problem from Oblivion carries over into the expansion as well. On the PC the game also has some stability issues. The game crashed multiple times on two different systems, and locked up one system several times throughout the course of the game.

It will take you a good 20 hours to complete the major quest line, but there's plenty more to do afterward. With all the side quests to complete and territory to explore, you could easily spend 30 or 40 hours or more losing your mind in Shivering Isles, and you'll find that your time there is well spent. The quests, characters, and world in Shivering Isles are all as creative and intriguing as in the rest of the game. Oblivion was huge before, but now it's bigger and better than ever.