Belkin makes lousy products. I recommend that you avoid purchasing anything by Belkin in the future.
That said, all FM transmitters are lousy really. I suppose there are varying degrees of lousy. I have the Monster iCarPlay Plus and it's better than some, but FM transmitters just are not a good solution for connecting your iPod to your car stereo. If there's another option you can use, you should do so. Cassette adaptors work very well and are inexpensive, but most new car stereos don't have cassette decks these days. FM modulators are better than FM transmitters, but most people would need to get one installed professionally. All the rage these days are these iPod interfaces that connect to your car stereo's CD changer port. If your car stereo supports a CD changer and you don't already have a CD changer, then this is an excellent solution. Kind of pricey though. Good ones run about $100.