X & Y was one of the first CDs I bought in 2005. And I can not stress what a good decision it was. But I must say that it was not always so. When the CD arrived, I have only briefly consulted (little tip - never a big pile of CDs simultaneously buy) and so did not get to really appreciate. But over time, she liked getting better, I realized the depth of the lyrics, the beauty of the melodies and all that. In the meantime, X & Y is one of my favorite CDs. Playing tips: "Square One," "White Shadows" and "Fix You".