Just bought a Jawbone for my old Motorola V710. Wondered if having an older phone would hurt advertised voice quality. No problem. Lots of others complain about fit - but its so good when it works that you should get one from Verizon or someplace that accepts returns, and just try it for yourself. It fits me like a glove.I played with the ear pieces, using the shorter one (I'm 6' tall), and with the earbuds, using the long one with the less radical bend. Tweaked the metal frame a bit both for curvature and angle till it lay right, and voila. Earpiece sits very securely on and in my ear and easily contacts my cheek as required. I can shake my head vigorously, bend down to tie my shoes, nothing even slightly dislodges it.Then I tested it. Called my roommate from it with the stereo playing at least as loud as I talk, with both music & vocals. He answered and I asked "can you make out what I'm saying over the music?". He replied, "what music?" He could barely hear the music in the background and I was crystal clear. Even my hands free voice recognition in the Motorola works much much better due, I'm assuming, to the increased pickup quality of the earpiece. People are often unaware I'm even on a headset, whereas with my previous 2 year old Motorola bluetooth headset (a generation or two back in bluetooth design) people were constantly complaining about the quality, asking if I was on a speakerphone, and I would routinely have to dump to the handset.I love this headset, and having read the mixed reviews about the new Jawbone II am quite happy keeping this one - especially since I got it at Verizon for $80 out the door w tax vs $110 minimum plus tax for a II, and because looking at the new one, I'm just not sure I could get as secure a fit as I have with the original.So again - like I said - try it out yourself. If you're lucky and it just fits right without alot of fussing as it did for me, you will be divinely happy. (Also - despite having read many complaints about difficulty getting it on and even worrying about that the first couple times I tried, I now have it down to a trivial two second place and turn to hook it on my ear.)If you can't get it to stay and to contact your cheek reliably, then sigh and move on. Good luck.