Connection: no problem with LG Nexus 4 Motorola and G. Sound quality: not too bad, well enough means to phone in the car, we hear the speakers well enough. Standby time: great, lasts several weeks. By communication, I can not judge, I do not phone long enough with.
But the big downside: I broke my two round plastic ear, and do not want to trick the ear without. Plastic is too delicate for a headset that is supposed to handle frequently.
Considering the price of tour of replacement ear, I recommend the product.