Don’t promise if you can’t deliver
Last year i replaced all the windows in my house that that expensive, double-pane, energy efficient kind. Today I got a call from the contractor who installed them.
He was complaining that the work had been completed a whole year ago and I still hadn’t paid him for them.
So I told him just what his fast talking salesman had told me last year.
“these windows will cut your energy bill in half and pay for themselves in one year”.