After owning multiple older Motorola models and a Plantronics (dumped that one in a day), this 710 is the "Best of the Bunch".  Folks that I speak with find it much easier to understand me, and the noise cancellation feature must work a bit, because regular road noise is no longer complained about.  Still, if a diesel truck is nearby, folks will hear it.  I wonder about the new 715?  Would like to give it a try too.  My son has a 710 also, and I do get some echo when speaking with him.  I am leery about trying the Jawbone, have heard too many fit issues.