Bests & Worsts Reviews from Amazon

I have now had two of these sets of headphones and am in the process of returning the second. I'm writing this review in comparison to a set of Plantronics BB Pro 2 headphones that were separately connected to the same devices as this Bose headset, so the issue is definitely the headset and not the device. First device: - Noise cancelling worked sometimes in one ear, sometimes in both, and sometimes in neither. - The headset would randomly emit a death screech at maximum volume in one ear. After returning the first device, I thought that there was no chance I'd get a defective product twice in a row. I was wrong. Second device: - In a 15 minute period, I experienced 4 random power flickers which resulted in the device power cycling, announcing battery level, and reconnecting to the device it lost connection to. I'm really disappointed with the quality level of these considering they are a ~300$ premium device. Hitting 1 quality issue happens, but two devices in a row is absurd. In contrast, I've had my other noise cancelling set for years and it has no issues. It's unfortunate as this device has a lot of positives (good battery, great sound, easy to use, nice carrying case and compact fold pattern) but none of them matter if the device doesn't work. 1 star.