From the initial sales chat and quotation from Bill, through the survey process and the installation team doing their job very efficiently, I have no complaints and can offer solid praise for the quality of our dealings with Thermoglaze. We needed to replace 12 years old windows and doors and got good advice as to efficiency and styling and are extremely pleased with the finished result. Our home is much lighter and (although early days in winter yet) much cosier. Would willingly recommend.