Pros
I worked for ADT for 2 years and learned a great deal but also saw the frustration and demands put on some of their employees. The company has been around for many years and is the industry leader in home security so the brand is well-known. The CEO is a great guy and the HQ environment is nice, friendly, and the company caters to the employees by having a nice cafeteria (that is partially subsidized), a good size fitness gym (free to employees & their families), and numerous other perks like Starbucks café, drycleaning, chiropractor and doctor office, and secured covered parking. Overall, the company does well, the people enjoy working there, and the benefits are really good.
Cons
Though the company has a lot of employee perks, the hours and demands of the job are brutal. Senior management had unrealistic expectations of employees output, asking to work on weekends, at night, and never respecting employee's personal time off. Many of my coworkers felt the same and were just beaten down by the work and putting in some long hours, many times leaving at 9pm or later as regular. Their is a lot of turnover, at least with the finance department, which is indicative that something is wrong and that people are not happy. Job growth is mediocre and given to those that are part of the "in-crowd". The company is still struggling to find their way and until certain management is replaced, they will continue to search. I have worked at other companies where the environment was much better and if ADT had this type of environment, then I probably would have stayed. Not all departments are the same though so be careful what department you to choose to join.