They make good quality sound and well built for sure. Engineers have done a good job. But their business model is flawed, they usually make money by renting out the headphones. So they disable your headphones anytime when they think you breach their terms. They very idea of this headphone can be remotely deactivated is so scary. And you need either Android or iPhone to use the headphone. You have to install the app, else it won't work. Such a controlling platform, run away like a plague. Check and read reviews online if you need more clarity