Has anyone found a really good bluetooth headset?

[Ross Leavitt]

I'm sure I'm not unlike most other BP users in spending a large portion of my workday talking on my bluetooth headset, but all too often the caller complains of poor quality until I take it off. I got a Jawbone Era which is supposed to have good quality, and it still doesn't cut it. Have any of you found a bluetooth with great audio quality in real-world situations?