This is a very great product. out of all of the head units i have owned this is one of the best. the hands free blue tooth sound clear and no complaints of road noise or static on the other end. and the on screen caller id is a really nice feature. the user ability with an Ipod is awesome it hooked up in a mater of seconds. unlike them cheap touch screens this one has just a about perfect sensativity and its so easy to use and navigate. on most digital cameras you can take out the SD stick and put the pics right onto the head unit.The USB working good i have a 80GB hard drive in my car and i can lisen music or watch videos.