We interviewed 4 companies for our project and chose Certa Pro because Dave was quick to respond and offer suggestions. They determined a start date and on that date Mark and Ken showed up. I can best describe the experience as professional from all aspects, the guys kept us well informed and paid attention to detail. Mark went above and beyond with suggestions on better a colour match for our trim and Ken spend hours sanding and preparing our staircase. I would not hesitate to recommend this company and if we do our lower we will use Certa and ask for Mark and Ken...excellent job!