Sound quality - I bought these headsets not only to make calls but also listen to music and use the remote control buttons while running or walking. The sound quality is surprisingly good at this price, I was not expecting much regarding sound quality but these headsets are pretty good. Not as great as more expensive brands, but good for money.
Calls: the headsets do quite a good job with calls and I have no complaints.
Cons: The white headset came with a white clip and white cushions, but the black one lacked both the clip and the cushions. I have a spare clip and cushion from previous headsets but I was expecting that both the headsets will come with clips and a cushion pair.