I sleep in my car occasionally, and this occurs when I need a good sleep and no other options are available (such as camping with heavy snorers). I have used an inflatable air mattress, it was not too bad, but after trying several ones I had to pick a thick one, which eats a lot of available height. And it's not horizontal at all. I am reconsidering to get a dream case despite the high price. But for the (enormous) price, I really need it to: 1) Provide very good comfort 2) Be super durable People on forums seem to validate the 1) without any hesitation, but does it last well? I'm concerned about the foldable "plank" that prevents the head side of the mattress from falling behind the front seats. Does it work durably, without folding or bending? Thanks!