I purchased this item to avoid taking my eyes off the road when using my iPhone for music playback through the AUX analog input which was shared with my Sirius portable. The ISGM571 meets my needs and provides an excellent user interface. I can now leave my iPhone and my Sirius tuner connected and have eliminated the myriad wires I had running around the car. Installation was simple as advertised (the hardest part was figuring out how to remove the radio bezel). Information not appears on the radio display and controls are also through the factory radio. The only downside is iPod/iPhone music interface. I have my entire music library included, and it takes some time to run through the artist or album list to locate the disired selection. Once selected though, the sound is excellent.

I got this for a 2010 gmc like the way it work it ezay to use and worked in the truck very good my wife liked it also I order her one for her nissian car in her car it was a little harder to get it to working but its the way the radio is not the way the isimple works but after working it a few times the wife had it going and loved it over all its some thing we both enjoy having in our truck and car its the best add on for the iphone to use on the road!!!