From time to time there are threads posted in these forums where people are expressing dissatisfaction with a product or manufacturer for whatever reason. Well, I'm happy to say that I have no such issue and in fact I'm very pleased with my recent experience with Aftershokz.
Last October I purchased a Bluez-2 headset direct from Aftershokz. I really liked this headset but sadly over time the headband developed a crack which I felt would ultimately result in complete failure of the headset. After contacting Aftershokz and providing them with the purchasing information they promptly shipped me a replacement headset. There was no hassle at all and they did not even want the old headset back. From my point of view Aftershokz gets top marks for customer service.
Interestingly the design of the Bluez-2 has evolved since I bought the first headset. On the newer version the headband feels more robust and I notice that the transducer pad that contacts your cheekbones now has a small rubber pad that seems to act as a small spacer . I'm not sure why that is necessary but it is there anyway. Finally, I notice that the function of the buttons is slightly different and now works per the manual.