No delay in hearing the instruction on my (old) Vauxhall. Are you playing anything continuous via the the FM transmitter ? - the FM transmitter will turn off in there is nothing playing, and may be slow in starting when it occasionally gets something to play. I usually have some music playing from my N900 and Cygic briefly pauses this to play any instructions/warnings. Works great for me. If you don't want music playing, someone suggested recording a silent mp3 and playing this in a loop in the music player.