The lack of noise intruding into dialogue is great, and better still it's coupled by good quality on both ends. I had no problem hearing everything once I worked out that the headset's output is varied by your phone - there are no volume controls on the headset itself. Those that I called did comment on a slight tinny quality to my voice but nothing to hinder them in understanding what I was saying. There was no such issue at my end, suggesting to me it's a side effect of the noise-cancellation processing. Whatever the cause it's no big issue.
The Jawbone Icon hooks up with a desktop application called MyTalk. You'll have to be a US resident to get full use of this, as a range of 'DialApps' are available - bound to a press and hold of the talk button. As these apps include "Jott Assistant," an app for updating Twitter, Facebook and the like via voice commands, perhaps that's for the best. The option to choose one of six different voices available for the Icon is available to us Brits. You could even use Spanish, French or German voices if you wanted.
MyTalk also makes it possible to change the configuration settings for different phones. Considering the Icon can be paired with multiple devices that's probably the most useful aspect of MyTalk - everything else is a little gimmicky.
Still, a few superfluous features shouldn't put a damper on what is a brilliant Bluetooth headset. The Icon's call quality is commendable, with noise-cancelling technology that works just as advertised and I'd argue it's among the most attractive and comfortable headsets to come through the TrustedReviews labs.
The Jawbone Icon is exactly what we've come to expect from this line of Bluetooth headsets. Its attractive well thought-out design couples with great performance to justify its price.