I don't understand the "it's too hard to get the window back in" part? For ventilation, it only opens about 8 inches, so it's not likely to come off. If there's a screen (mine has one), I don't think that would do much to stop someone in an emergency situation; you just push it out and go on through. If your rig is on fire to the point you have to use the emergency exit window, who's gonna care about the silly screen? I haven't examined the hinge on mine, but I would assume the window is designed to stay attached (via the piano hinge along the top) during egress in an emergency?
We use ours frequently when we can. We don't get to very often because of the weather though; it's either too hot or too cold. We have one in the front bedroom and one in the bottom bunk in the rear, both are the same IIRC.
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!