Aye, particularly if you live /travel through anywhere built up transmitters can be a pain in the butt. Work out a direct connection solution if you can. If a transmitter is your only option then the key is finding one that tunes outside of the edges of commonly used radio frequencies, if it tunes down to 87mhz (many stop at 88) then 87mhz is where you're most likely to get an interference free trip.
I went with a direct connection after 3 consecutive annoying transitters, all which broke down. I keep one now only because I often use hire vehicles, but don't bother with it for anything other than long rural stretches