So I got to check this system out at the Mountain Rendezvous this weekend. What surprised me is that Linda said, "lift the corner of the mattress and grab a corner and start pulling". Little did I know at that moment we were pulling the system out of her rig and taking it over to our FWC. Cool. Got over to our rig and put it under the 3" thick foam mattress. Immediately I could feel a major difference. It had a more "home mattress" type feel to the bed and not the hunk of foam you typically feel. A real test was laying on my side, my hip didn't feel the pressure that I feel with just the foam. We did check how easy it would be to latch the top down and it does take a little more effort as I need to pull the top down to get the latch to catch. From that part though, it didn't feel like it was putting any more stress on flipping the latches down.
Overall I am thinking of this system. The only real downside is the price. I think we are going to try a memory foam topper that we already have (used in the Kamparoo before we replaced the mattress completely). If that works, it's a free fix. If not, this will likely be the next thing to go with.
Thanks again Linda for letting us check it out... in our own rig. It was hard to bring it back to your rig.