We had Storm Tight windows installed about 2 years ago. The windows have been very good. The first thing I noticed is a more unobstructed view out of our house. The second thing I noticed is the decrease in the noise from outside the house. The third thing I have observed is a decrease in our electric bills, particularly during the air conditioning season. I would buy more, but I don't have any more windows to replace. PLEASE NOTE, we bought our windows from the Carlton office, at least that is what we were told. That was NOT a location choice so I picked Houston.