I'm having a tough time deciding on whether to leave. I currently have the Lumia 1520 and love the phone and OS, but the third party apps are terrible compared to their android/ios versions and XB music has been really problematic. I'm actually considering getting the iphone 6 plus with it's crappy interface just so I can have access to itunes exclusives. FYI, you can upload itunes exclusive songs to google's music cloud service, but not XB music - you get an unknown song/match error). I also like that fingerprint sensor on the iphone as I always enable security on the lock screen. On the other hand, I know Android has some better OS features and app versions (e.g. LastPass) then ios so I'm also considering the Note 4. Also, since I use Chrome as my desktop browser, Google Now is freaking awesome (I have an older android phone I still play with). I'm basically waiting to see the reviews of new phones coming out and I'll probably make a decision after seeing the Nexus 6 and the Note 4... or hope Nokia/MS makes an announcement.