I have a pair of these and I agree with you on a few points, not so much on others. First off, in my opinion, the sound quality IS better than Beats, I sold mine after getting these because of the difference. As far as "soud leakage", I would expect my large over ear headphones to be heard, if turned up loud enough, by someone sitting next to me, but only in a room with 0 to minimal noise. I do like the case they come with, love the option for Aux cable, love volume controls on headphones, they way they fold up, and the INSANELY long battery life and quick recharge. The sound, bass etc. vary and become better the higher the volume. I have 0 problems with the build quality, although they do kind of make my head look small, its hard to explain. Anyway, these are by far the best quality over ear headphones I have ever had and right now I am testing Pro, Studio Quality headphones, by a different company and they don't even come close to the quality of these and they are double the price.