Notably surprised by its connectivity with iPhone. Once paired, the buds ( either single or twin mode) simply connect to paired phone automatically each time the case is opened. The connection is completed before they arrive your ear. This is much better than my other Bluetooth earphones for which I never know for sure if connected.
Transition between single- and twin-mode is fully automatic. All you need to do is open or close the case which seems to serve as an EM case switch.
Tap gestures (call/play/ volume control/Siri) are simple and work well with iPhone.
Product manual was professionally written and was easy to follow.
Battery lasts long enough to be complained about. Never stress tested yet as I simply put back to the self-charging case at night.
Sound quality is excellent and volume range is large enough.
Material and craftsmanship are a surprise as they have good ear ergonomics and as a whole feel very solid.
For the price, a total bargain to surprise in quality.