Recently used on a flight and had to use ear plugs in order to hear because of the background noise. Otherwise, I like them. The vibration takes some getting used to.
Daily use of various models of these for years. They'll wearout after about 2500 to 3000 hours, and its usually the titanium frame or charging port, not the sound quality that finally kills them. The magnetic charging port addresses one of those issues. The titanium is just material feature.