First unit arrived DOA, which was very disapointing but after i thought about it it was probably due to some shipping bumps and bruises, the important thing is that Amazon was very good about exchanging it out in as timely a manner as humanly possible, and that the unit i got is such a great headset. Its way more comfortable than any other headset because the ear insert is made to actually fit the shape of the ear its not just a round insert. Periodically have to check to make sure its still in because its light as a feather and no, it seems like it never does come out on its own. Sound is sufficient for the noisy backgrounds i move into and out of during the day. Excellent headset.