We recently purchased a bunch of double hung windows, they came out and installed them for us, but that night, we noticed that our entire house is drafty and cold. I bought these windows to be more energy efficient, not to let cold air in, the sill was not lined up with the frame, we had to put towels under all of our double hung windows, about 20 total. We called them to fix them, but it took ages to get an appointment to fix them, when they finally came to fix them, they could only work on 1 window at a time, so we need like 3 appointments 3 months apart to fix them all.
Reviewer is in unhappy mood. This person is quite happy with customer service and offered to fix for free and stated that there is a room for improvement of how bad they did at insalling fancy windows. Please immediately contact the author of this review to discuss bad quality of andersen windows and associated monetary loss in the amount of $3000. Andersen Windows needs to read this review and look into the issue (if any) according to poster's claims.
Other people also mentioned andersen windows in their reviews. You may find this information helpful for further shopping at Andersen Windows. You can also consider other company suggested by the author: Marvin Windows And Doors.