The screens on mine are useless. With window open, all sorts of bugs
come in (gnats, flies, mosquitos, etc). With window shut, the bugs all
end up inbetween the screen and window, then dying, forming great big
mass bug graves at the bottom of the window.
I used a place local to the north east US, for the same price (maybe
$10 more per window), and got much much nicer ones. Mechanism and
latches were nicer too.