I have purchased 4 different Jabra headsets, because they are the most comfortable and easy to hear with, but they have poor microphone quality. I thought I would try this model, the MX150 Flexible Boom. Again, sound quality was crap. I make a living on the phone, so others being able to hear me is very important.I have ended up getting a Ge Tl26593 Earset Microphone by Jasco which has worked the best so far.