I found the 655 to be so light and unobstructive that I sometimes forget it is in my ear (I do not use the curved support). The noise suppression from the DSP allows me to talk and hear clearly even with the top down while driving. The voice-dialing support has missed perhaps one command since I upgraded my phone (UT Starcom Pocket PC) voice software. The Bluetooth range is a full 30 feet plus and I get about a week's usage out of a full charge. I highly recommend this unit for anyone considering a hands-free device.