I have three words: Covered in Rain.
I don't know how many days I have wasted by whilst listening to that ten minute track, but to be honest, it was a pleasure to waste away the time listening to that divine piece of music. There are very few people now'days' that actualy understand a guitar. John didn't need to sing on this track a lot, because his guitar said it all.
I don't actualy own the CD, but I do have the DVD- (the store was out of the CD) and wow... that's all I can say about the song. Amazing.
All the other tracks are great, but Covered in Rain is truly epic. John Mayer is true marvel.