I don't know if this is unique to my phone or512mb windows phones in general. I have a large collection of music on my phone, about a 1000 songs, however using the xbox music app was like being forced to mutilate myself. It was extremely slow and laggy and took time to load songs even from store artists. Today, upon downloading the update, the app runs faster than a coked up three year old on a floor made of butter. Anyone else having any other experiences?