(1) The cushion is quite hard when you're not used to that. While there are after, but does so a bit sluggish. Otherwise it's a great part, which contributes to a peaceful and relaxed sleep when you have found the correct height.
(2) To me it is a mystery why you can not make 80 times 40 centimeters in standard size such cushion. Then it would not only look better in standardized bedding, but also prevent slippage of so much too big pillow cover.
(3) Even the reduced price is still completely covered.