I've used a handful of different transmitters for my iPod from Belkin to Griffin, but the Monster had the best sound quality out of all of them. Signal is so strong that I rarely experience interference, and I don't even have to have my iPod's volume setting at maximum. With other transmitters, I usually have to turn up my car stereo volume high to hear my iPod and when I turn off my iPod, the radio comes on blasting. Not with the Monster.I do miss my previous transmitter, the Griffin iTrip Auto Universal, because it had the USB port that I can charge with. I'd give the Monster a perfect 5 star if it had that same feature.I should mention I can only use transmitters that connect to the iPod using the standard 3.5mm audio jack because my iPod's bottom dock is slightly broken in that it does not transmit audio.