I use one for the sat-nav (T.T Rider 2) and linking to my phone (sorry to "indignant of down South"
) a P990i and the bluetooth com system works as well as anyone could expect.
Having said that, I find it is a very noisy lid, and heavy but there again I live in it all day, most days. The Shoei 900 (dragon) is a far better fit, is quieter and doesn't make me look like a numperty (Box says!)
Now that the Rider 2 comes with a Scala bolt-on I use the Shoei more and it works as well as, if not a little better than the Nolan set up.
Each to his/her own but I don't think I'll go for a Nolan again - the Schuberth C2 now....mmmm!