I can't reply with it being an option as I thang opted for the complete frameless option. However, I can say we have very seldom used it as an operating window. There are enough other venting windows, as well as the MaxxFan, to supply fresh air that we just don't need it for that, even in hot climate.
2017 Escape 5.0 TA
2015 Ford F150 Lariat 3.5L EcoBoost
2009 Escape 19 (previous)
“Most folks are about as happy as they make up their minds to be.” — Abraham Lincoln