Im having increasingly frequent difficulties turning the earbuds on and off. Bought them to fit on my racks that hold my xl thuele on my GMC Denali xl. You can monitor price fluctations and buy them when it drops. I have since recently upgraded to the new bluetooth Bose QuietComfort 35s and they are fantastic Battery life is probably less than announced but it can definitly last multiple days without charging. There is no sibilance to speak of, and as a treblehead, Im happy with the highs on these. You can always trust Sennheiser to make quality gear. It would be nice if it included nails, I?m currently using very thin nails and it?s held up even with my slings on it (they?re fairly heavy). Los terminé comprando a muy buen precio y mis expectativas eran muy altas, dado los miles de reviews de estos audífonos. Ive been trying to break these shoes in here and there for about a week, on and off, and still have a way to go.