I was worried as it was a very old window! The first upright was a bit of a problem - the wood frame didn\'t allow screw penetration until I drilled pilot holes, but that was OK. Might be something to include on the instruction sheet. Otherwise it was fine. Good product .
Net Promoter Score is a loyalty metric used as a KPI for customer experience, measured on a scale of -100 to +100.
To calculate the NPS, we first ask customers to answer the question "How likely is it that you would recommend this company to a friend or colleague?" on a scale of 0 - 10.
Customers who answer 0 - 6 are Detractors, 7 - 8 are Passives and 9 - 10 are Promoters. The NPS is the sum of % of Promoters - % Detractors.
