Hello
I had windows from the company WIKKA installed in my building and can only recommend the company. During the installation, two panes cracked but were replaced after five days. The advice from a friendly salesperson (directly at the factory in Kirrlach) was technically unsurpassed compared to other consultations, first-class.
My parents also had the windows replaced by the company WIKKA in the renovation sector,
and here too the information regarding delivery time, etc., was accurate except for a deviation of 2 days.