That was my first Bluetooth Headset, and can not give any comparisons to other models. But what I can say: The seat of the ZX 600 is ziehmlich loose, have a feeling it falls Down and understanding quality diminishes greatly. For the money I had something better presented and not son wobbly affair. No Kaufempfelung !! I now have the Plantronics Voyage Pro Ordered, hope it's better !!
