I got my replacement windows installed by American Energy Master Inc. back in June 2018 and am extremely happy with 28 OKNA DH 400dx windows. I was referred by two other friends who had their windows replaced and my end result was same as theirs; "one more happy & satisfying customer". From start to finish, I was really pleased with estimation, negotiation, communication, contract & installation process. Bob Timbers is the owner who helped us with the whole process except installation and I was extremely happy with Bob for listening to my needs & willing to work with the budget we had without sacrificing the quality of windows. Bob is also a great communicator - kept us informed of schedules throughout. In addition, the installation went pretty well. It took 4 days to complete the installation but I am extremely pleased with it. Two Brazilian gentlemen (Marcio & Marilo) with many years of experience covered the work area and cleaned afterward without rushing to ensure quality of installation. They are tight, well-constructed & beautifully installed! I think I am already realizing some savings on my energy bill but will know more as I review my energy bills for several more months. As far as the windows go, I haven't had any issues but I have no doubt that American Energy Maters/Bob will care for any issues that may arise in the future with their lifetime warranty. Great company who I strongly recommend if you ever have a need for replacement windows!!