After 2 days of use, I say that it does the job for hands free calling, but for music, forget it, the speakers are awful.
You get what you pay for.
Replace the speakers with something else. I've just been using them for music with standard headphones so far and they have been pretty good. There is definite background hiss, though. Not an audiophile so don't know what to call it, but that hiss you hear when it's supposed to be silent.
I'm just going to put a microphone inline with my headphones for calls and linking with another one. I haven't even tried the speakers that came with them.