I have two pairs, both are used for the iPhone7. Pairing isn't instantaneous, but not really too bad, probably around 7 seconds. The seal is good, which makes it next to sound-canceling headphones. If they're going to be worn in situations that require good situational awareness, I would suggest loosening them up a bit and not cinching them tight. Some people I know find the fit uncomfortable, but I don't see it as a problem. I have about 5 hours of use left before charging at about 10%.
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