I gave these a chance based on quite a bit of research online, and they do not disappoint. I am very particular when it comes to these new generation of earbuds with no wires whatsoever, and I have tried 7 different brands including the major names.
I am often on conference calls together with my spouse. We use these when we do calls together, because each person can use one earbud from the same set. There is no echo or "lag" which is a game changer for us. It's so cool and wish we had these years ago.
Before purchasing mifo's O5 model, I used AirPods, which are basically impossible to use during my runs. These not only beat the sound quality of AirPods, but battery is 2x as long and build is sturdy. They will not fall out no matter how hard I try to shake them. Excellent product 5/5