They OVER CHARGE for labor! I have a security system that snaps a picture each time someone walks by one of the cameras. The pool tech was at my house a total of 28 minutes and I was invoiced and charged for 50 minutes. I called the office and they indicated they were not going to change the invoice even after I explained that I could show them recorded evidence he was only there 28 minutes. It amounted to a 20% increase in my bill!