Changed out the factory sofa/bed after the first year. We tried to sleep on it just once...........never again. The bar was sticking into your back, and the ergonomics of it being a sofa were nothing to rave about.
We replaced it with a zero clearance love seat recliner set that works really well, from a real furniture store. As mentioned by another, the backs come of easily for fitting through the door. We can still use the seat belts if needed. The comfort of this unit makes the occasional sleep overnight better than the original unit.
After all..........we never planned on being a Holiday Inn on wheels.