After reading this thread, DW and I did some research and decided on this mattress
We had a discussion about buying the 9" or 7" and decided on the 7". The 9" would have extended above the counter a bit and put me 2" closer to the angled wall and bubble window. We were concerned 7" of memory foam would not be thick enough.
The mattress came FedEx the day before we were leaving for a week-long trip. It comes rolled up with a lot of the air removed, not too bulky at all. Took it out of the box and put it the camper while we unwrapped it. It expands quite a bit and it fits a little better than the original. While unwrapping it we thought we were smelling the mattress but it turned out to be the plastic it is wrapped in. There was no odor or funny smell at all.
DW took a nap on the mattress within 15 minutes of installation and pronounced it good.
We left the next day for our trip and slept better than ever. With the old mattress, I found I had to flip to sleeping on my left side, then my right side every two hours or so, but with this mattress I don't think I ever moved all night.
Once home we realized our mattress in the house is not as comfortable so now I am sneaking out to the camper to sleep!