After looking around online just now I find it very disheartening that they all have in the discription that they are made for people needing the occasional seat or for grandparents/carers/daycares. I don't think it is that uncommon that families have 4 children under the age of 7 and that a child still needing a booster seat (by law) will have to sit in the 3rd row permanetley. Should their safety have to be compromised?
They safety isn't compromised. It's just that they aren't as comfortable, durable, soft, built to last. They have to meet safety standards. Just they aren't as high spec as the other ones.