I was really worried about how well this device would work but it is absolutely amazing. However it took almost an hour for me to figure out how to get the earpieces placed correctly. It reminded me of learning to use contacts, it took a while to get it right but once I knew how it went quicker and after I practiced a few times I had it down. It is necessary to allow the earpiece to go all the way into the ear, if you don’t hear it drop in your ear you have done it wrong. I found it was best to lay my head on a table and drop the earpiece into my ear. Then I held the ear canal closed on the side with the earpiece already in it to put the earpiece in the other side. Once both were in place, I shook my head a couple times to fine tune the sound and I was good to go. Though the sound was clear with only one earpiece in I wanted to know if I could get both earpieces at once. I’ve been wearing them around the house and so far the system has stood up to housework without any issues, it’s still hidden and playing perfectly. I can hear the audio while standing close to the tv at normal to loud volume, but the vacuum was way too loud, I couldn’t hear anything. (I have just had my hearing tested and I have average hearing.) Further experimenting proved that if I turn my head sideways and shake my head the earpieces will fall out or at least fall away from the ear drum so I can’t hear it. Also if I jerk my head at whiplash like speeds I can dislodge the earpieces. The neck ring/wire is visible if you wear really tight clothing but is hidden under a normal form fitting T-Shirt. I’m busty so the battery can fit nicely in a sports bra, I would recommend a money belt or something worn around the waist for greater stealth if you don’t wear a bra like mine. It also comes with a handy on off button that turns the audio off on my phone. (I’m currently using my phones music playlist for testing.) I am not sure that this device is meant for hard use and I wouldn’t want to get it wet but for the price it’s a pretty handy device.