I've got a brand new 2011 cadillac CTS-V, and I love the car, but the stereo was a little lacking in power. A good friend recommended Fritz's after getting his Audi worked on and after listening to his stereo I decided to take my car to Fritz. My main concern was keeping the original look of the cadillac dash, and Fritz was able to incorporate everything I needed seemlessly using the original factory radio. We added a couple amps and a subwoofer and changed out all the factory speakers. I gotta say, THIS THING SCREAMS. I'm extremely happy with the install, for he was able to fit the subwoofer in the trunk, but it looks like it was originally built into the car. While there I found out about their window tinting service, so I decided to get my windows tinted too, and it really set off the look of the car. All I gotta say is if you need something on your car done, take it to Fritz!