Amazing game, you WILL get side tracked. So much to do, so much to see...
Pros - Sound is good, character creation is great, development of being able to take your character any direction at any time is a nice touch, you'll want to explore and not always fast travel, item creation and enchanting is great as always, the story line - regardless of which path you take - the main quest, or many of the many side quests are all equal in quality. NPCs across skyrim do not know of crime, kill someone, and the witnesses and your bountys gone! Sneaking now works better, the working eye was a nice addition.
Cons - Sound is good, but sometimes has issues, NPCs following you don't have a clue how to follow you on the explorer map... often getting stuck and left behind till you enter a town/sleep. Some quests have minor bugs/glitches that need to be patched on PC, and XBOX (Companions funeral "Glory of the dead" quest for example, or sometimes the golden claw in the earlier main quest - the door will be unable to rotate/activate the sliders). Dragons are easy... (most). After about 30/40 hours the map seems a bit small, Oblivion just seemed a bit larger not sure why. Only 2Gigs of RAM are used for PC performance (understandable since its also made with consoles in mind. I'm sure someone will come up with a MOD). Loading times of XBOX suck.
Over all the game is very addictive, it has well over 60 hours of game play, I've played and am playing on PC and XBOX - its a beautiful game on the PC. It has a amazing storyline, and will suck you in if you let it - and I', not just talking about the main quest. They've made a wonderful addition to the Oblivion series and its going to be a instant classic. This is one of them crazy games that you not only get quality, but quantity.
Well worth your purchase and play time.