I do use a Sena SMH 10 bluetoothed to my S3. My S3 provides me with tunes (MP3s and streamed), voice directions, voice notifications. I have it mounted so I can see google maps / navigation - pick tunes, read text / emails - while at red lights of course. To date I've never used it for hemlet to helmet comunications (intercom) - you really don't want to know what's going on in my helmet
The Concours comes with an accesory plug on the dash and my phone is plugged in via a micro USB cable. Works great! Very cool set up... Technology is great when it works as advertised!
Oh yeah - forgot... Silly me - I also use it as a
phone too... to take calls on the fly and just say "CALL HOME" and the wife on the line.
Another thing - the phone takes pretty decent photos... So I can quick snap a picture at an overlook or such then mount it back in it's cradle - never have to leave the bike... then send it to the wife to confirm I'm actually in Indianapolis or wherever...
One other thing - until recently my Wife could track my location through google maps. The good thing is she can track my whereabouts, the bad thing is she can track my whereabouts. Really - I ride lone wolf frequently and if i were to take a wrong turn over the side of a mountain in the West Virginia wilds someone could come find my cold dead carcass. Nice thought hunnn!