@mooseandriosmom We have one, it's on the spare bed, but I've used it a number of times especially when new.
It was initially great, so comfortable, but over time, the memory foam has lost it's comfort factor, and the bed feels like it's on a slight slope.
I also have an expensive sprung mattress. It's now 12 years old, and it's still the most comfortable thing I've ever slept on.