Conclusion: For the price, the build quality could be a bit better. The shirt clip seems a little flimsy and cheap and threatened to fall of my shirt once in awhile. Of course the closer the unit containing the mic is to your mouth the better the quality of the call and the best results were clipping it to the top of a T-shirt. Would I Recommend It? Yes, with next to no reservations. Phiaton has done something special. They made a nearly perfect product.
Pros: The best sound I've heard on any Bluetooth Headphone, logical and intuitive design, lots of eartip options, clear and quiet phone calls, long battery life, comfortable and convenient, a fair price for what you get.
Cons: Noise cancellation not as good as I'd expect. A rather flimsy clip.