What you should expect from your installer or serviceman, first and foremost, your interest should come before his. I would expect to be offered the best service and product available with competitive pricing. He should provide you with the pros and cons of different spring services such as torsion vs torquemaster springs before installation. I would expect him to notify you of any safety problem or concerns that he may notice on the job. I would expect him to not upsell you on products you don’t need. To make every effort to respond quickly to your needs and services without charging a outrageous emergency call fee.
Always remember, Garage doors are under high tension, if cables, center bearing bracket or end bearing bracket are loose or not secure to wall, call a professional to service them because serious injury could occur, these parts are under high tension..