Received in good condition in a month's time. The single dynamic driver on each side helps with the bass response. However, compared to the C16 which comes with eight BA drivers on each side, the overall response is a bit dull. To be fair, the earphones are still in their break-in period, so it would take a while for a better response from opening up. While certainly being cheaper than almost half the cost of C16, this is great value for money. My personal recommendation would be to save for a top dog model from CCA, if you can afford. I've replaced the stock with a 16-core TRN cable, and it makes the earphones sound much better. I did not ask the seller for discount, but asked for memory foam tips and the seller included them in the package as promised. I was surprised to see the seller pay attention to details to the individual customer level. At US $39.22, after a $2 store and $5 AliExpress discount coupons, this was a good deal. Highly recommended.
Very nice iem.