Hi dmcgill,
My wife and I got a Sleep EZ 10,000 + topper. We have had the mattress for a little over a month now and I have enjoyed it even though it took some time in adjusting the layering combinations to fit my PPP the way I like. With that said it is quite easy to adjust the layers to give the bed a different feel. My wife likes it because my side of the bed and her side of the bed are different and are suited to each of our needs.
You can read more about my experience with Sleep EZ in my post here. You will also read about my experience in swapping layers around as I have kept the thread going with the changes I have made to the mattress so I have a reference later on.
I hope this helps you out and good luck with your mattress buying experience!