Escape Hatch?

I typed it in search, and it didn't really come up with much. It seems to be more common to install an escape window than an escape vent/hatch. Hengs seems to be the most common brand, but review aren't the best. I had one in my truck camper, and thought about putting one over the bunk on my gooseneck as well. I could pop out of the top and climb down the neck into the truck bed in an emergency. Speaking with PPL Motorhomes today, apparently Hengs bought out the competitors and there isn't much else. Has anyone gone this route, or just stuck to the escape windows?