There is a slight delay between the time when your phone rings and the BlueAnt kicks into gear picking the call up but this product is very convenient to use between multiple cars. The device holds a charge for a long time so you do not need to constantly take it out of the vehicle. Also works when we may be using handsfree built-in Onstar system with no interference. Very easy to set-up between your Bluetooth phone and BlueAnt. I highly recommend this handsfree speakerphone.