If you live in the US and have a chance to test it, or even better, to return and get a full refund, give it a try. It’s not for everyone. It’s sticks out of the ear and doesn’t stay in place, I tried every size and tip model you can imagine. I had to adjust it every couple of minutes and I was lying still in bed. Walking? No way. Commuting? No way. I had mine for 5 months then I let them go. I just don’t believe when JH said they studied thousands of ear impressions to design these universal fits. 64 Audio universals fit like a glove. Fischer Amps (from Germany), fit perfectly. And those companies don’t brag they have studied thousands of ear impressions to make their designs. My 0.02 anyway.