Very cheap construction, which frays and leaves lint everywhere. Two gel bags inside two sheets of foam that offer nothing. I fell for it. A waste of the few euros. It's not worth anything. We threw it in the trash within a week. Don't order it and get fooled like I did.

I've had it for a little while for the car. On the positive side, the gel pouch between the 2 cushions (it has 3 layers: foam-gel-foam) makes it quite soft. On the negative side, the outer fabric seems quite cheap, it will probably tear easily. Also, the zipper hangs outside and I'm afraid I might damage the car seat. The white "wool" on the top side is quite warm, probably not suitable for summer.

Overall, if I look at it, it's not worth the 20 euros, but it does make a somewhat noticeable difference in how you sit. Normally, it would deserve 3.5/5.

UPDATE: After 2 months, the bag burst and the gel spilled out. Now it's not worth even 5 euros!