First off, if you really like watching YouTube vids on your phone, you owe it to yourself to pick up this app. I have tried the others, and have settled on this one to be my go to YouTube app. I wish it were on Windows 8, I wish it were on Android cause the Google made apps are not as good as this one. The user interface was well thought out and very pleasing to the eye. It has an aesthetic that I really appreciate. I like especially how it just flows when you swipe left and right, no lag, no stuttering, just smooth and intuitive. Video playback is also very good, video's look stunning on any Windows Phone I have used, be it the Lumia 920, or now with the 1520. Sliding your finger across the screen to move the video forward or backward has completely ruined me on any other YouTube app. Simple things like being able to share vids from in the app are just icing on the cake. Best YouTube app you will ever use, it puts to shame all the others.