I have a Mustang GT convertible, and I bought the Cobra CBTH8 after having watched the unbelievable demo videos. They ain't lying. With 70mph-worth of wind and engine noise, I can still carry on a cellphone conversation. Listeners know I'm outside, but not in a wind tunnel. Should you order one and NOT get these results, try exchanging it for another; it seems Cobra has a little problem with quality control. The first unit I got was useless with even minor wind noise (top up, passenger window down). The second unit was a keeper for me.