At first I thought it looked decent since the interface was clean and the HQ videos looked good. But now the more and more I use it I realize how much it sucks. To start, you can't do ANYTHING while watching a current video without it stopping. So if you want to comment on the video, read it's info, or put your phone on sleep, the video stops playing. Because of this it makes YouTube useless for music. YouTube is one of the best music sites out there (since almost any song is uploaded in video form), but because you can't put the phone on sleep or do something else while it's playing it's unusable. Why would I stare at an image on my screen at full brightness for 5 minutes while listening to a song? It's a battery killer and makes no sense. Also the search feature is weaker. For some reason when I search stuff on YouTube.com I get much more results than I do on the mobile app. Lastly, you can't tweak the settings to make HQ video as the default. The low-quality videos are awful and you have to go into settings each time to change it to HQ.