We selected Able Glass to install our windows. The installation went fairly smooth. On the first day, three guys came (on-time) and removed all the old windows and rough installed all the new ones. The next day three guys trimmed off the inside and installed the sliding glass door. All in all, We are VERY happy with the new windows. The house isn't drafty at all anymore, it's quieter inside and the heater doesn't run as long as it used to. My only complaint is that they laid one of the windows on the front lawn for just a few minutes and it burned a nice rectangular pattern into the lawn. It's OK now, it grew back. Between the new windows and the attic insulation, our house is becoming very energy efficient. Someday we should really replace our heater. It's thirty+ years old.