Audio and video installation service near Huntsville, AL

I bought my sister a new care stereo today. This is to replace the brand new she bought in December here at Sound N Wheels. If you ever need a car radio, DO NOT go to Sound N Wheels--after getting installed, we got home and the rear window defroster didn't work. They claimed to have nothing to do with that. After leaving, Renee discovered the CD player is defective. It gets to the middle of every CD and starts skipping. We took it back and they claimed it works fine for them and it must be the CD's and said one problem was that she was listening to books on CD instead of music CD and they didn't recommend that. DUH--like that makes a difference. After "looking" at it to tell us this, we get home and the blinkers and hazard lights no longer work and had to take it back again. They at least fixed whatever they messed up on that. Filed complaint with the Better Business Bureau and saw someone else had a similar experience. They have not answered the complaint. I guess we just eat that wasted money because they won't do anything and we don't trust them to touch the car anymore and wait to see what else they mess up.