Travis Butler for TidBits has posted a review of the iTrip, SoundFeeder and iRock FM transmitters.
I wish the signal was stronger so reception could be clear and consistent across the city. I wish Griffin could have come up with a less cluttered approach to tuning, though I’m not sure what would work better.
Would I recommend the iTrip to others? Yes. If nothing else, the massive improvement in convenience over the other FM transmitters is worth it.