Not quite sure what any of the above has to do with the utter ineptness of the fitter, I watched him force the rear view mirror housing off the old windscreen, no amount of parts (expensive or otherwise) brought by the "technician" would have negated his ham-fistedness and "can't be bothered" attitude, which resulted in broken housings and sensors.
My insurance company, nor its smallprint have anything to do with the undertrained monkeys that get sent out, regardless of glass company.
I was generalising; didn't realise you had such a buffoon work on your car.