AAFD: Now have 60,000 miles on the Navion IQ 24G. No problems at all with the rear Queen slide.
We have a memory foam topper and always leave the bed made up. If you pull the rear foam section up above the front section just a little on each side before you retract the slide, it will fold up easily without the need to remake the bed. When extended, simply push the entire mattress back against the rear wall. Hope this helps. The Next Hill