Be very careful. I didn't do my due diligence by shopping around and they took me to the cleaners. I felt they cleaned out my wallet afterwards and then I checked out Best Buy and others and found out the alarm would have cost me only $235 dollars there. Audio Express DID NOT stand by their original quote and added extra installation charges to the $1 install they advertise and added parts I did not need. I ended up paying over $100 more there than anywhere else with the additional charges. I fought with them over these added charges to no avail.
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