I read a lot of reviews on this headset. There were so many good ones I esaily dismissed the bad as people who had just happened to get a counterfeit product. I paid a bit more and got mine direct from Amazon as I wanted to be sure I got the real thing. All the specs matched. The counterfeit guide by Motorola confirmed it was the real thing.Then I tried to have a conversation with someone. Half the time it was loud and clear, the other half the person couldn't hear me at all. My thinking was the noise software not only cancelled the noise but also my conversation. It seemed though that any little noise was enough to cancel out the entire conversation. I would leave messages for people on voice mail only to find out later that they got a message but it was too muffled and garbled to understand.I returned mine to Amazon and noticed that, apparently, Amazon is not selling them directly anymore. Wonder why that might be.Anyway, I opted for the older model (HS850). It is larger and not quite as slick, but the talk time is rated longer (8 hours as opposed to 6 for the H700). So far, no one has told me my conversation is not understandable. Save a few bucks, get the older model that works.