In my experience, unfortunately only partially, quality is relatively good in the Champions League, but not in the Premier League / Super League. It may also depend on the game / channel. On the blueTV app directly on the Samsung TV, the quality is surprisingly more consistent and better than on the box. Otherwise, the box is very good, YouTube/Netflix etc. no quality problems at all 4K top. Apparently the problem with blue Sport is still with Swisscom and it's annoying that you can't guarantee on which devices the quality is always right. Changing devices is also very difficult and restrictive on the part of Swisscom. Hope this helps with the question anyway :)