Nice customer service, Melissa was great.
Melissa was really nice over the phone and explains everything that you would want to know
By Hank
Sunday, November 8, 2026 · Customer reviews of US businesses
The Fair Hearing score
Great
813 reviews
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Honesty, pricing, process and quality scores appear once 5 customers have rated them.
Guardian Interlock provides ignition interlock systems (also known as "blow and go" or "car breathalzyer" for people who need or want them after a DUI/DWI arrest. We provide high quality services and devices to make the process of installing and using an interlock as easy as possible.
Guardian Interlock (guardianinterlock.com) has 813 customer reviews on The Fair Hearing, with an average rating of 4.0 out of 5.
Showing 541 reviews with 5 stars · Clear filters
Melissa was really nice over the phone and explains everything that you would want to know
By Hank
Lady Julia was very very helpful answered all my questions no issues, was very cheerful and assisted me with making my appointment flawlessly. The company so far has made a great first impression on me through her.
By Jonathan
I called to schedule an appointment through Towanda. She was very kind and informative So far I am very pleased. Thank you Towanda
By Julian
Tawanda was very helpful
By Sarah
Very positive, encouraging & personable rapport.
By Storm
They were very helpfull and friendly
By Zachary
Don't even go to any other interlock service, they're the best
By Gisselle
Carolina was very friendly and helpful, I felt like she was personally invested in making sure I would have everything I needed to be authorized before my appointment.
By Liz