Early this year, I upgraded my copy of the MacSpeech Dictate voice recognition program to version 1.5.8 and included the bluetooth-powered, Plantronics Calisto headset as part of my purchase. After only a few weeks of use, the rubberized earpiece broke off from the rest of the assembly.
Contacting MacSpeech support via their web site, I negotiated the exchange of my broken Calisto for a replacement. At the Macworld Expo held in San Francisco in February, I received feedback from a MacSpeech representative that the original headset had a manufacturing defect and that I should be receiving an improved model in the mail. A few days ago, I opened the box that contained the new headset and was pleased to report that the hinge that held the new earpiece in place was much more securely fastened that the original model.