One of my biggest disappointments with moving from my iPhone to a 1520 was the Spotify app. I bought the 1520 thinking that I could run Spotify for my music needs. I was disappointed to find that the Spotify app would crash every time I opened it and selected "playlists." Sometimes, the app would crash upon as soon as it opened. On occasion, I could open the app, manually search for music, and then play it...but my large list of playlists would never open without crashing the app. Well, something in WP 8.1 fixed that problem. I can now open my playlists and everything plays as it should. Not a single crash yet. WP 8.1 is a fantastic update...more like a WP 9 rather than 8.1...and, in my opinion, surpasses iOS as an operating system. The dead app tiles and massive amounts of empty screen space on iOS feel very outdated. Well done MS! A working spotify app is like the cherry on top of this update. I understand that an updated version of the spotify app is coming soon...but I am very happy to finally have a usable app during the interim.