Too hard
I bought this for my elderly mom to use in the tub.  She loves to take baths but needed something to give her cushion so her hips and back don't hurt.  This did not fit the bill.  When we got it, I was worried about how hard it was, but so many reviews said it was great that I thought maybe it works well in the water.  Mom tried it and hated it.  She said it felt way too hard and wasn't an improvement over having nothing.  It was a waste of money.
Rating: 2 stars