Don't get me wrong the System 5 is a good helmet and in certain areas a great improvement on the old System 4, but the chin strap where it passes through the cheek padding is not. Although it will not affect the safety of the lid is a very bad piece of design and will tear through where stitched. It is NOT acceptable on a lid costing £280.
Don't bother buying the Shoei as the syncrotec design is 5 years old and being replaced later this year.
I am still waiting to find out whats going on. BMW and M*** have gone all quiet on me. One more week and then I'll be demanding a full refund or a new lid