The job was several years old, but I did not get round to writing this until now.
I asked for quotes from multiple contractors. Ambia eventually got the business because (1) the sales rep, Michael, made a very good impression on us during the sales presentation (one contractor applied pressure tactics at the end of the presentation, saying that he would give so much discount if we signed the contract then and there to save him another trip coming back; this same contractor later turned out to be on the Ontario Ministry of Consumer Services' beware list), (2) Ambia was one of the recognised installers on the national Window Wise registry, (3) Ambia was able to address all my concerns after the sales presentation, and (4) unlike some other contractors, Ambia's quote was very reasonable. I was able to get a sense of which quotes would be more on the outrageous side because I had done some research beforehand and made comparison between the different quotes.
The job started on the stated date and was finished within the estimated two days. Everything was cleaned up at the end of the job. There were only some minor issues during the 2-day installation. When installing one of the doors, the installer neglected to rewire the doorbell. Some areas of the drywall around the window frames and door frames were inadvertently damaged. After we reported them to Tony, probably Ambia's manager, the installer returned to fix them to our complete satisfaction.
One issue I found Ambia particularly accommodating was with the enclosure to the main entrance. The job was done in October, but the enclosure's exterior lever handle became corroded after the winter. Tony got the manufacturer to replace it after we reported the defect. Then in less than 12 months the lever became corroded again; it was replaced again. Everything that Ambia did has been fine ever since.
When I had another contractor to do some interior renovation work for our house later, he commented the installation was very well done.
An honest contractor does not find excuses to dodge responsibility. I believe it is important that a contractor resolves customer concerns when there are issues with the work performed or the parts used. If I ever needed to replace windows and doors again, Ambia would be my first choice.