I bought the privacy sheet as a combination deal with the mattress.
It does its job, and does it well. All non-tinted windows are blocked off. Where the product could be better, (as also noted by the Swiss Philippe on 21/8/22) is that it could easily have longer skirts in the front, so air-intakes are not blocked, but also in the back.
The product as shipped now, is perfect for use with all seats up. For example like a changing booth on the go. However, as soon as the back seats are put down, the back skirt falls down very easily. I fixed the problem with a heavy object in the storing pouch, but would have liked it if the skirt were somewhat longer, so I could tuck it into panel gaps in the rear.