We took 2 windows. In January and October, 24 years old. Production takes ~3 weeks both times. Installation the first time is 1.5 hours, the second time is longer ~2.5-3 hours. Perhaps the temperature outside played a role. The first window without complaints during operation. Second, I think it will also be no problem.
From the nuances of operation: ordered windows with slopes. When opening the sash to its full width, the blinds damaged one slope
I put up the windows and did not regret it, there were no jambs (there was a scratch on the balcony door), but everything was quickly fixed. The girls at the store are very friendly, the installers will explain everything 100500 times if necessary. All the staff are very patient and friendly))