My car (2008 Mazda CX-7) doesn't have an AUX jack and FM transmitters suck. There are a lot of iphone adapter kits out there but not as many Android ones, let alone reviews. These are three that I've found and am considering: TranzIt USB IS32 - Universal Car Integration Kit for Smartphones, MP3 Players Mazda CX7 2007-2008 - AUX, iPhone, iPod and MP3 adapter Mazda 2002-2008 GROM USB Android interface adapter Does anyone have some experience with any of these to share? They all differ slightly in price and functionality. I'm leaning toward the Grom Audio unit but I would like to read some opinions before I spend that kind of money.