its really nice! I had a D300 in my old SHO and I missed it sooo much when a deal came up for a d310 i jumped all over it! it plays computer files so i can put music on a disc as files wich when saved as files about 180 songs can be saved on a disc. and I can control my IPOD with it and i can hook up a back up camera. this system does a lot and is really a great system.