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Name Number of ratings Checkbook's top rating () Firm's price index score What percent of customers rated firm "superior" on our survey for "overall quality"
for quality for price
1. Anti-Crime Lock & Alarm Co
15205 Bunchberry Ct
Gaithersburg, MD 20878
301-279-0991 		How does "Anti-Crime Lock & Alarm Co"
rate compared to other home security firms in Gaithersburg , MD?
 Subscribe Washington Consumers' CHECKBOOK Magazine to find out.
2. C & C Homation Systems
19120 Harkness Ln
Gaithersburg, MD 20879
301-670-9775 		How does "C & C Homation Systems"
rate compared to other home security firms in Gaithersburg , MD?
 Subscribe Washington Consumers' CHECKBOOK Magazine to find out.
3. Granite Security Svc
21318 Golf Estates Dr
Gaithersburg, MD 20882
301-527-6390 		How does "Granite Security Svc"
rate compared to other home security firms in Gaithersburg , MD?
 Subscribe Washington Consumers' CHECKBOOK Magazine to find out.
4. Guardian Protection Services
8475 Helgerman Ct
Gaithersburg, MD 20877
301-330-1399 		42 ratings How does "Guardian Protection Services"
rate compared to other home security firms in Gaithersburg , MD?
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5. Sentry Installation
15940 Derwood Rd
Rockville, MD 20855
301-670-1008 		16 ratings How does "Sentry Installation"
rate compared to other home security firms in Gaithersburg , MD?
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6. Ultra Guard Security Systems
PO Box 5598
Derwood, MD 20855
301-570-0700 		13 ratings How does "Ultra Guard Security Systems"
rate compared to other home security firms in Gaithersburg , MD?
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7. Guardian Alarm
PO Box 509
Germantown, MD 20875
301-972-1545 		10 ratings How does "Guardian Alarm"
rate compared to other home security firms in Gaithersburg , MD?
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MD
Beltsville, MD Bowie, MD Chester, MD
Columbia, MD Crofton, MD Derwood, MD
Gaithersburg, MD Germantown, MD Halethorpe, MD
Highland, MD Jessup, MD Kensington, MD
Olney, MD Pikesville, MD Potomac, MD
Rockville, MD Silver Spring, MD Upper Marlboro, MD

VA
Alexandria, VA Arlington, VA Bluemont, VA
Dumfries, VA Fairfax, VA Lorton, VA
Manassas, VA Vienna, VA

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