Windows were installed with incorrect brackets for the size of window. When my electrician went to open a larger window, the hinge ripped off the bracket and the entire 100 pound window fell 3 floors, missing an excavator by a few feet, and almost brought the electrician with him.
When my sales person was contacted, they were initially defensive, but when they saw a photo, they could tell the wrong brackets were installed. Due to supply, it was some time before a replacement was provided, and the windows couldn't be opened during this time.
Incredibly, the wrong brackets were installed a second time, and the windows would not shut after being opened. At this point, due to supply chain issues, it was around 9 months until they were able to come back and install replacement brackets, though not the ones they were hoping to install as they cannot source a critical part.
Windows will still not close after opening, and so I'm unable to risk opening them, and have had to contact Vinyltek to come back onsite to close. Their service technicians have not been providing details or providing adequate testing.
This has been a disaster, and although they are dealing with supply chain issues, the critical mistakes that were made and the lack of clear communication on which windows were functional, was completely unacceptable.
I would look elsewhere for windows to a company that has their processes more polished.