We have our front and back windows replaced, total 8 windows. It is the Oran-Glengrove Premium Window system and they are good quality, insulate with multi-chambered frames. We have them installed for over 3 years now and noticed the gas bills during winter months have descreased significantly. The workmanship is good as the windows were replaced from wall to wall and they did a thorough clean-up before leaving. I highly recommend this company.