I bought one of these when I saw them at another office. I used it briefly and thought it was great so I bought my own. The hardware and sound quality is good, but I'm giving it only two stars because Plantronics blew it on the over the ear headsets and general design flaws. The over the ear attachments are horrible. They should be of Jabra quality, the kind you can wear all day long. Instead they are cheap flimsy plastic that are not strong enough to keep on your ear or support the microphone. Switching to the over the head attachment is not much better as it grips a little too hard, causing it to be noticeable right away and painful over time.The headset lifter is also large for what it does and it "glues" onto your phone. I was surprised that was how it was designed. Poor execution in my opinion.For ~$240 I expect this product to have great quality and excellent design. Unfortunately they only got part of the equation right.