Hi Mick:
Hope you have fun with it. I am generally satisfied with this helmet and audio system - I guess the best way I could sum things up would be to say that the helmet itself is close to perfection, and the sound system is a reasonably good 'first attempt' at providing a Bluetooth audio system in a helmet. In other words, the WCS-1 is to audio systems what the StreetPilot I was to GPSRs - a good first attempt, but not a fully mature, all-the-bugs-worked-out product.
I have noticed a couple of minor irritations with the sound system, I'll share them with you to spare you the learning curve:
1) Whenever you turn the helmet on, it goes into 'Setup Mode'. You see a green light that blinks very quickly. In order to get out of setup mode and into normal operations mode - to allow the GPSR to function with the (previously paired up) helmet again - you have to press the power button briefly a second time, to knock it out of setup mode and put it into normal operations mode. Now the green light will blink quite slowly.
It took me a while to figure this out. The GPSR will recognize the helmet when it is in setup mode - you will see a message on the GPSR screen to the effect that it has recognized the helmet - but the helmet won't function (won't send or receive audio to the GPSR) until you press the button a second time to get it out of setup mode and into normal operations mode. This is a helmet issue, not a GPSR issue.
2) The first few times you use the helmet, let the battery run dead before you recharge it. This way, you will 'exercise' the battery fully - the correct way to break it in - and you will also learn what all the low battery warning tones are, and learn how the helmet behaves when the power runs out. This will spare you surprises and confusion later on. I found that battery endurance continued to increase with each charging cycle, up to about the 5th cycle, at which point I stopped letting it run dead before recharging it.
3) The BMW instructions suggest that you mount the speakers loose in the ear pockets. I did this, but didn't like listening to them rattling and buzzing around in there. So, I mounted small acoustically transparent foam pads to the front and back of the speakers, to cushion them and hold them in one place. This got rid of the rattling.
Addition of Foam Pads (sourced from an aircraft headset)
PS: It is not necessary to use the double-sided tape to attach the foam pad to the front side of the speaker - you only need the tape on the back.