While I don't see why this game was such a big deal when it first came out, it is pretty fun. Nice assortment of races to choose from. You can even be a cat! YAY! Lots of different side quests to do. An enormous open world to explore. You can craft and upgrade armor and weapons. Visuals are nice. Music is really nice. Voice acting is good. Combat mechanic is good. Runs decent on my win 7 Mac Pro.
Only con would be, it's hard getting mods to work without breaking achievements. and watch out when it updates!