I am located in the Bay Area in California and had the Alside 70 series installed a few years ago. Before I decide on my purchase I was educated about the Alside windows by my sales person. I also saw several different samples of the 3 series they offer on the West Coast. Those are the Alside 70, 80 and Excalibur series. All of the above mentioned windows have no snap- in sill on them, and are one solid frame. In the past I had seen other comments on the forum stating a defect with the snap- in sill windows produced by Alside. I went with the 70 series, since it was the less expensive and had less vinyl frame and more glass out of the 3, but yet still had a very durable construction. I wanted to clear up any misconceptions, since those defect windows were and are not sold on the West Coast. I am very happy with my choice and the windows look great, make a big difference in my heating bills and have a lifetime warranty!!