I had 14 windows installed last spring by window world, everyone is drafty. The workmanship of the installation was piss poor.So far after 2 calls they have done nothing.I would not recommend window world to anyone. The inside trim joints do not fit right, and they banged up the trim on installation.Cold air comes in all around every window.Outside trim is very sloppy and unprofessional.A three window unit in front of the house is trimed out in metal, and is the worst looking mess you ever saw. The installer Mike Morgan is supposed to have 20 years experience. I must have been building dog houses. read full review »