We had 3 basement windows replaced, as well as 2 larger windows on our 3rd floor. One of the windows at the back of the house was a challenge as it sat in an old, rotted out frame. We also had the window opening enlarged by about 50% which required some additional work cutting into the wall and reframing the window area. Our house is over 100 years old so even with the other 4 windows there were little quirks here and there which required using a little bit of extra thought and care into the installation. But the Front Entry Doors crew did a great job installing the windows correctly and they look great. The windows also came in much sooner than originally expected so that was a nice bonus too.