Excellent product and service
Received the earbud, this is the first time having a earbud. First impression is the sound was very very soft. So much softer than a normal iem. Maybe this is the characters due to open back and isolation. I do not know as I never had a earbud before. But when you pump up the volume which required a a great amount, that is when the sound really open up from these earbuds. Maybe I am too use to iem, I find the sound not as details and not as powerful as what I wish for, but I Guess that is the character of a earbud. Still, design is great and well made.