I started useing the Chatterboxs about 8 years ago. I won,t ride without it now. Everyone I ride with now has them. MAJOR safety factor!! You have to watch out for the moisture getting into them though. I,m on my 3rd one now.( just silicone up the connectors that you don,t use.
The nice thing about them is you can plug in a mini dics player or a CD player or I pod a jam to you favorite tunes while cruiseing down the trail. Just watch out for the corners, they can come up real fast when your getting into you tunes!!!
ACDC is a killer on the corners!!