I have the base model but fully loaded including premium sound. I have no rattling and I do have some base. I said it sounded pretty good, not amazing like my other cars! It's at least tolerable for me. I am interested in doing a few upgrades to stereo but am waiting for you guys to come up with some easy less expensive fix. I would like to share a story. One of the dealerships I went to I had the opportunity to sit in several cars to check out the difference between stereo packages. I was so impressed that the sound was relatively clear. I asked if we could change it to a booming sound and crank up the base. Still clear but zero base. We turned base up and down with zero difference. The dealership actually just cut the line to the sub!!!!!!!!! I couldn't believe it. So tricky. I brought it up to the manager and he said it would be fixed with the satellite antenna replacement. What a load of ... I had a hard time with the dealerships around LA. Either I didn't like the color combinations, hostile salespeople, and the one I really did like and wanted to use never called me back. I spent an hour or two there and called a few times to see if they could locate the car I wanted for me. I was so lucky to find Reeves even though they were out of state. The dealers here said it was not possible to buy the car for what they were asking for and laughed at me. I got my dream car at an amazing price. Ha! Who's laughing now?