We only use them in the cooler months when the heat goes on. We have a 17z. I find that just keeping the bunk ends open during the day cools the trailer off good enough. We always get questions about them and the last time we used them was in early May. I'm heading out next weekend and will be installing them as soon as I can.
They are great in the cooler months because they prevent the dreaded condensation from forming inside the bunk ends. Before the gizmos, you would get drops of water hitting your face while you we're sleeping. Now, you stay perfectly dry. I couldn't recommend them enough.
I'm heading out 10/3 and have the super high wind ones so ill snap some pics for everyone.
2013 Jayco Jay Flight 26RLS - 2013 1500 Ram Big Horn
2013 Jayco White Hawk 28DSBH - 2010 V8 Tundra
2012 Jayco X17Z SOLD!:Beerchug: