I've used the Voyager 855 for about 15 hours and I am pleased with the purchase. I use it with an Iphone 3G while working out. For me having the headphone cables out of the picture is worth the drop in music quality. I get some pauses in the music if I don't turn off the WiFi on the Iphone. I get the impression the phone gets too busy to keep the music playing. The noise cancellation is not very good on the out-bound portion of phone calls, but I don't use the phone that much while working out. (No one wants to hear that much heavy breathing.) For the price it is a great buy.