As a new owner, I have to admit they aren't as bullet-proof as I was expecting. Saying that, I seem to be having next to no problems using them with my iPhone SE but my MacBook Pro isn't performing as well. It is a 2015 model, so I'm wondering if the bluetooth is just more reliable on the more recent iPhone.
I get brief drop-outs, especially when browsing and using the laptop for anything else, and occasionally playback just stops and I have to disconnect and reconnect to get them working again. Not massively impressed to be honest.
That aside I love pretty much everything about them when they *do* work (I was actually surprised by the audio quality - it is far better than people make out) but they aren't as problem-free as I was expecting on a Mac.