I actually own the 655, but it's got the same form-factor of the 650E.  If the 650E doesn't have the crummy DSP that's in the 655, then it's a lot better.  I had the old model 650 without the DSP and it worked fairly well with a RAZR.  Then I got the 655 with the DSP stupidly thinking it would improve things.  It didn't.  Noise went up (for the other party) and the reception was so poor it always sounded gravelly/gargley on this end.  Hopefully they use the same electronics in the 650E that they used in the 650 and it'll sound a lot better than my current one.

I lost a couple of the earpieces wearing it in the stupid charger unit clipped in my pocket.  It faces the earpiece outward in this use case, and any time you brush against anything, the earpiece pops off.

The good news is, if you call up Plantronics support and tell them you lost your earpiece, they'll send you a new set, free.  At least they did for me!

On other topics also affecting the 650E -- it has the same buttons as mine.  Yes, they're very hard to press and I have to mash the headset into my ear to click the button, but it works.

All in all I like those earpieces; they hold well in my ear and I don't even use the ear clip.  If only they didn't fall off all the time.  You have to always carry it in a little bag of some kind to keep it from getting lost.  I have a little pouch in which I keep the headset and the charging base (and sometimes the battery holder) so I can charge it when necessary.  I also got an iGo tip for the native Plantronics base that I carry with it and can use with my iGo chargers with my PC or in my car.
I actually own the 655, but it's got the same form-factor of the 650E. If the 650E doesn't have the crummy DSP that's in the 655, then it's a lot better. I had the old model 650 without the DSP and it worked fairly well with a RAZR. Then I got the 655 with the DSP stupidly thinking it would improve things. It didn't. Noise went up (for the other party) and the reception was so poor it always sounded gravelly/gargley on this end. Hopefully they use the same electronics in the 650E that they used in the 650 and it'll sound a lot better than my current one. I lost a couple of the earpieces wearing it in the stupid charger unit clipped in my pocket. It faces the earpiece outward in this use case, and any time you brush against anything, the earpiece pops off. The good news is, if you call up Plantronics support and tell them you lost your earpiece, they'll send you a new set, free. At least they did for me! On other topics also affecting the 650E -- it has the same buttons as mine. Yes, they're very hard to press and I have to mash the headset into my ear to click the button, but it works. All in all I like those earpieces; they hold well in my ear and I don't even use the ear clip. If only they didn't fall off all the time. You have to always carry it in a little bag of some kind to keep it from getting lost. I have a little pouch in which I keep the headset and the charging base (and sometimes the battery holder) so I can charge it when necessary. I also got an iGo tip for the native Plantronics base that I carry with it and can use with my iGo chargers with my PC or in my car.