We haven't gotten our windows yet, but I must say so far the customer service has been great. The salesman, John Krautz was delightful. He treated us, seniors, like family. We'd had a few other companies give us estimates but after visiting with Mr. Krautz, we decided to buy all our windows and doors from Comfort Windows as long as we get John Krautz to do the estimate. I've never felt so comfortable with a salesperson before. He thoroughly explained everything and helped my husband start our new lawnmower, and gave us advice on gutters. If this company hires such wonderful and helpful salespeople I can imagine the actual people who do the job will be perfect as well. I'll be back to add on to this review after we get the windows. The demo was most impressive.