I ride all year round mostly with a crew. The Crew all have the 1st Chatter Box and the X1-Slim generation Chatterboxes. This new X1-Slim cuts in and out as we ride and try to communicate through Florida's roads! Also, when playing Pandora radio or FM radio ,It cuts in and out ! I rather use the old 1st generation Chatter Box!
Without a smart phone app to manage controls, the Senna is proprietary and determines the functions of other audio applications. Range is dependent on line of sight between riders. Multiple riders have had battery life go bad within a few weeks. Mine has lasted a few months but is now dead.
This was my 3rd SMH5 Helmet Kit. I bought the 1st two in 2013, one for me and one for my riding partner (brother). I needed another for a second helmet I bought. Each helmet is fitted with a SMH5 Helmet Kit; I just transfer the main intercom unit from one helmet to the other when I want to change from full face to open face. Piece of cake! They work great.