Most importantly, the ANC is quite good, although it does remove all of the low frequencies from the audio, making music and podcasts sound tinny. The build quality is good, but the earphones do not fold and the buttons are a bit plasticky and unlabeled. For some reason, it switched language to Chinese. The function that pauses music when you take the earphones off works erratically and is very very frustrating, you can switch it off in the bluedio app (which doesn't need all the permissions it asks for) but sometimes it still triggers? The app also allows you to turn off 'sleep protection', which I did, since I have no idea what it is. The microsd slot is a bit hard to reach. For the price, this thing is amazing. The microphone is very bad. Low sensitivity, muddy sound, it sounds muffled. These headphones can't be used for phone calls etc.