Currently Being ModeratedDec 17, 2012 10:16 AM (in response to Adambr)
People in general dislike Change and it is true that there were and are a few bugs with the software.
I have downloaded it to my 3 machines and had no stability problems with it. It takes a little while to get used to doing the things you want. But in general I like Itunes 11 and would not go back.
It is a little bit like at work when everybody got the New Microsoft Office with the ribbon toolbar approach. There were howls of derision. If you were to go back to those people today you would have to pry that software out of their cold dead hands.
Points to note
By Default iTunes 11 does not Show the Sidebar. so View > Show Sidebar
Search Entire Library can slow things down so uncheck that
iTunes Match can impede adding new songs either from iTunes Store or CD