I'd hold off on it. Its still somewhat buggy. There is some kinda FormID bug that causes you to lose items and corrupts your save game. (But, I think it only effects people with large inventories or games with 100 hours or more) Bethesda is telling everyone to back up there save games and prepare for a full reinstall when the full patch comes out. Plus alot of the really cool mods out there are still updating to be used with it. I use about 30-50 mods to oblivion and they add alot of great features to the game. I'd hate to jump into shivering isles without them.
Right now they released a temp fix until the full patch is released:
http://www.elderscrolls.com/download...es_patches.htm
You can read about it here:
http://www.bethsoft.com/bgsforums/in...owtopic=675905
here:
http://www.bethsoft.com/bgsforums/in...owtopic=675741
here:
http://www.bethsoft.com/bgsforums/in...owtopic=675889
and here:
http://www.bethsoft.com/bgsforums/in...owtopic=675953