This is my first bluetooth headset. I had been using a wired headset (old school) with excellent results but recently bought a Blackberry Curve that didn't accomadate the jack. I read all of the reviews of the Plantronics 510 which were all positive. Overall I am very impressed with the device. The sound quality is very good. I wish the volume could go a little higher as I have a slight hearing impairment but it is usable. Noise reducution is good and the battery life is excellent. You will need to speak in a clear voice otherwise the listener will not hear you well. Overall I am satisified with this product and would purchase again.