Is anybody using Apple Iphone with a bluetooth headset on bikes?

Today i have just been asked what headsets are compatible and actually work.? I have been online and seen whats available. But has anyone got first hand experience before the trial and error sitiuation. :

I know the Scala systems work well but not sure with Iphones.... ? all the reviews say they work great but no mention of the Apple Iphone working with it..


Just thought id pick your brains.... :P