The quality is far better than the PS4 app, every day since BF4 launched, there have been one or two guys that I watch that stream from their PS4 every day in addition to the main guys that I watch. This is really crisp, and it's smart that the chat shows up on your own screen but not for those who are watching on Twitch, which is also far better.
Best news is that it saves archives, which is another thing the PS4 app doesn't do, which is perfect for me since I can just save entire gameplay moments with chat audio regards of whether I make clips on the Xbox One itself.
Very, very impressed - all I need is the right price and the games I'm waiting for to come out and I'm in.