I also use it and I can tell you it is amazing...I have a modular helmet and when driving 120 km hour with it open my girlfriend says she cannot tell I am even on the bike....the only problem I have is that I have to turn it up in order to hear her....lol.....make sure you buy a helmet with large enough ear pockets for the speakers or you will have to mod the existing ones with a knife......speakers are quite large.....