A year ago we had all our windows and patio door replaced by Quality Home Improvements. We choose them in large part because their ratings all were 10's. We would probably have given them the same rating immediately after the work was done because everything looked good.
The problem started when winter came and we experience a draft coming through one of the ground floor windows. The window opens with a crank and we had cranked it closed. However it seems the top part of the window does not close flush even when fully cranked closed thus allowing cold air to come in. I realized we had not locked it but even when I tried locking it there was still a gap for air to come in. I had to unlock the window, go outside and force the window closed and have my wife inside lock it in that position.
We waited till the spring to call Quality Home Improvements to get the window fixed. It took several phone calls and several emails by my wife to finally get them to send a guy to come out to look at it. He saw the problem but said he couldn't fix it but would get someone else out to do it. No one came for weeks and weeks and finally I gave our salesman a call to say that I would be writing a review about this stating everything that happened. He immediately promised to get someone out to fix it.
Finally the installer came today 3 months after we first complained. He checked the window and saw that it didn't close flush when you crank it. However, he said that because it now will close flush when you lock it (probably because I forced it last winter) that's as good as it gets. I said fine because I was too tired to fight anymore.
The moral of the story I guess is to make sure everything is fine before you make your final payment because you are not going any customer service after that.