I replaced windows in 4 houses (my house, my mother's house, and 2 rental properties) in the last 2 years using services of Alex from Eurotech.
He is an awesome installer and always does a great job, on time - and on budget. His advice on whether to replace or repair the window or a door is indispensable, and quality of the windows he installs is superior at the very competitive price.
Alex is a pleasure to deal with; he is associated with Eurotech but can be reached direct at 647-808-0934.
I used different contractors for my rentals before but switched to Alex as quality vs promptness vs cost vs job outcome with him is far superior.