Pros
The only "Pro" to working for ADT is if you are absolutely desperate and / or need medical insurance.
Cons
There is not one department at this company that isn't hopelessly screwed up and that includes Installation, Customer Service and Residential Sales. Installers regularly screw up perfectly good orders if the job requires more work than they want to do. Customer Service does more to irritate customers than assist them. Management pretends that there are no problems and sales people are left to deal with the fallout. Salespeople are given totally inadequate training if they get any training at all. Salespeople at ADT are all commission and the company truly believes that if a salesperson starves, they will work harder to make sales.