If you buy the equipment there, they will usually warranty and replace it within the warranty period from the manufacture on their behalf, whereas if you bought the equipment somewhere else, they will simply warranty their work; now if their work can be proved to be directly related to the demise of something else, then sure they are responsible. Any good shop will warranty the WORK usually for life. Since I bought my alarm at Sound Advice, they warranty everything about it forever, except the remote; the work is covered forever, as is the brain of the alarm from Directed for example.