The sound for the price is amazing. Not what you would get from $250 ear buds but not far off and an amazing value for $20 . Nice base, good and loud, very clear. Fantastic value!
On Sound: The sound, treble, volume and bass and overall performance of these earbuds are very, very impressive for the low price I paid ($18 on prelaunch with a coupon). I have normal Apple AirPods and the quality of these Go Air just BLOWS them out of the water.
On Fit and Noise: The buds themselves block out noise physically with their fit. It's like having foam noise-reducing earplugs in your ears at all time. So if you absolutely need awareness of your surroundings (walking at night), these can be a problem. If you're trying to block out your surroundings (airplane), they will be a blessing. They do "fill up" the ear canal quite a bit which is weird coming from the world of Apple AirPods that fit more loose. I should note I have pretty big ears.
On the Mic: I called my Google Voice number and left a message at normal volume. I sounded distant so I'll have to speak louder with these on. But the message was crystal clear with no drop outs or weird Bluetooth connection drama. Just distant. They are in your ear, after all. I will probably have to pull one out of my ear when talking since it's weird with the noise-blocking effect mentioned earlier.
Overall: I'm extremely happy with the price point and music quality. These things sound simply beautiful and my sweet reggae beats finally have some kick to the bass which is quite nice. I can't speak to battery life yet as I just got them yesterday. I like the built-in USB cord for charging though and the fact they auto-power on when pulled out of the case.
I now have bought several budget wireless headphones from several manufacturers and these hands down are the most bang for your buck of any product on the market. I am impressed with the fidelity of something so inexpensive with almost instantaneous pairing with my phone, touch sensitive controls, and good battery life. You won't find another pair of wireless headphones at this price that sound this good. I'm definitely gifting a few of these for Christmas this year.