This was a very smart purchase. I ordered this bluetooth for use with my treo 755p and it took seconds to pair it and begin using it. I love all of the features that are enabled in this piece of equipment and the sound quality is great for both parties on the call. I gave it 4 stars only because the part behind the ear is kind of thick making my ears stick out a bit (I wear a very short hairstyle so it's very noticable)and it pushes the metal hook that I wear in my ears out. Other than these minor issues, I would definitely recommend.