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CHECKBOOK provides:
- Award winning articles and ratings reports compiled from more than 432,000 Washington DC area consumer ratings by Consumers' CHECKBOOK and Consumer Reports magazine subscribers who have used these companies and professionals.
- Thousands of hours of undercover price shopping.
- Review of complaints received by local consumer agencies such as Better Business Bureau (BBB) and attorney general offices.
- In-depth research.
- No advertising.
- No ballot-box stuffing.
- Nonprofit
- Read CHECKBOOK's free advice on choosing a local security system installer.
15940 Derwood Rd
Rockville, MD
Phone: 301-670-1008
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"I have much to thank Checkbook for. You have saved me a passle of money, I have used throughout this 220K renovation, I am 1/2 way through…Some day I will sit down and figure out how many thousands and tens of thousands of dollars you have saved me…" ...many more comments |
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16 ratings |
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| What percent of customers rated Sentry Installation "superior" for "doing work properly"? |
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| What percent of customers rated Sentry Installation "superior" for "starting and completing work promptly"? |
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Splaine Security Systems, Kensington, MD
N & D Security, Arlington, VA
Hofheimer Security & Telephone Systems, Alexandria, VA
Vintage Security, Jessup, MD
Guardian Protection Services, Gaithersburg, MD
5 Star Security, Bluemont, VA
Interamerican Security, Rockville, MD
Potomac Security Systems, Potomac, MD
Maximum Security, Crofton, MD
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Ultra Guard Security Systems, Derwood, MD
Burtel American Home Security, Alexandria, VA
Vector Security, Columbia, MD
Sentry Installation, Rockville, MD
National Security, Fairfax, VA
Allied Alarm Specialists, Alexandria, VA
ADT Security Services,
Guardian Alarm, Germantown, MD
Fire Burglary Alarms, Rockville, MD
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many more......
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