Given the RoadTrip's inflexibility, before purchasing one it's important for you to have a clear idea of what you need from an FM transmitter. If you mostly tool around in an area where the RoadTrip's frequency is unpopulated, if your trips aren't so long that you need to charge your music player while driving, and if you don't expect it to broadcast to devices other than a car stereo, the RoadTrip is a fine choice -- particularly given its price. If, on the other hand, you take long road trips that take you through areas with varying radio station densities and you like to charge (and listen to) your music player while driving, the RoadTrip is a less than ideal fit.

--Christopher Breen

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