Unfortunately I cannot give this product more than...

Unfortunately I cannot give this product more than 1 star. After 4 windows were professionally installed I waited the proscribed time to allow the windows to settle and all install materials to harden, but immediately had trouble opening and especially closing them, which continues to this day. The installer insisted that after the windows had time to "break-in" the problem would fix itself, but it never has. I also get condensation on each of the 4 windows throughout the year depending on the weather. The only positive is that I didn't have my entire house done in these, but instead waited to see what the result would be. I have since had all other windows replaced with another brand and can simply say, spend the money on a mainstream, higher quality window - otherwise you are waiting your time and money.