I?ve worn them in separate rooms from my computer or phone without any interruption. I?m not sure they could sound any better. I do lots of agility training as well as gymnastics style training, and they have no issues staying in my ears during any of these workouts, or even while upside down. Slipper cannot cover big bandgged feert Not the fault of the slipper - O no ue to me Soryf Theyre durable, comfortable and I like them a lot. Remember that you want them to be snug or else there?s no point to having a case! Update over a year later: Forgot to post this before, but here it goes. Ob man das benötigt, sei jedem selbst überlassen. So far, these z7m2 are my absolute favorite and with a 70mm speaker/driver, its one of the biggest on the market. My old $40 LG neckband that I replaced due to battery wearing out after 5 years of use has a better mic and sounds just as good.