Didn't Work
When this item arrived, I found it to be cardboard edged in blue tape. There was a tear at one end as if something had been pushed into it. Nevertheless, I put it on the bed in the way instructed. It didn't change the way the mattress felt at all. In fact, the surface was so smooth, the mattress would occasionally slip sideways on the bed and have to be straightened.  I had read all the reviewed before I bought the item and I believe I gave it a fair trial before I returned it.  It might work for some, but it definitely didn't work for me.
Rating: 2 stars