Window World received the highest numerical score among 16 companies in the J.D. Power 2013, 2014 & 2016 Windows & Patio Doors Satisfaction Studies. 2016 study based on 2,628 total responses, measuring the experiences and perceptions of customers who purchased windows and/or patio doors in the previous 12 months, surveyed January – March 2016. Your experiences may vary. Visit jdpower.com.