I gave my old WH1000XM2's away to family because it was sitting in a drawer after I bought the xm4, both still work like a charm and the xm2 only has a slightly reduced battery even after being used for 6+ hours daily for years. I don't know what the quality of the newer ones are, but the older ones are build to keep working. The noise-cancelling is the best one on the market for over ear headphones, the Bose ones put pressure on your ears which is really uncomfortable even after a few minutes (at least for me).