I have a treo 680 and I have never been "wowed" with any bluetooth headset.  This is my third, and I noticed a significant difference in the quality.  I drive a lot of highway miles, and I needed something to reduce wind noise at 80mph.  The packaging is impressive, and after reading the reviews on [...] that thought the "one button" control was confusing, I was able to use it right away.  On the freeway, others could faintly hear wind noise and road noise, but it was a significant improvement on other $100 models I had tried recently.  Three days into my trial, I realized how to turn on "voice isolation max", which is the maximum noise cancelation, and there was again a significant difference.  Wind noise was compleatly gone at 80mph, but when comparing and contrasting between the two settings, people said I sounded a little more distant with voice isolation max- but still very good.  I also noticed that at home, I could put the phone in the charger and walk into several different rooms and still use the headset- something other headsets faltered with.  I am very happy with this purchase- I love the packaging, the design, the charger (it actually says it's for the blueant on the charger, so it doesn't get confused with other chargers laying around), and I would highly recommend it to anyone else wanting to be safer on the road.