This thing works so good, it's scary, because i NEVER have products work the way they are supposed to.
So simple, plug it in, the ipod screen shows the radio dial, you set it to whatever number you want, and save it (there's 3 memory options) and then set the radio.
simple as that. interference is a minimum, which is a big plus. It also charges the ipod, another plus. The only strange thing i find is the off switch. I'm not sure why you would want to shut the whole unit off. It shuts of the fm transmitting, and the charging. If you want that, just unplug the ipod. Either way, it's just a curious feature, nothing major. My crappy old stereo doesn't support RDS, so i can't comment on that unfortunately.
It's a simple product for us people who don't have the luxury of the aux in port on their stereos, and works jst as expected...also works on my iphone too!