What do you think of this style of parenting?

I have friends who are wonderful and nice and great parents. They have good children, but sometimes I wonder about their parenting. Not that it’s any of my business, but I think it’s interesting. No, I am not criticizing their parenting, because my parenting may not be any better, but I’m just wondering. Here’s what they do. If their kids want something they will let them have it AS LONG as it’s reasonable and for necessary purposes. So, let’s say one of their children would like to go to the movies, or want this sweater and those sunglasses, they have to talk to their parents about it. Both mom and dad would have to approve. I think this is very clever, because most would say ” I want these sunglasses because they’re ‘in’”. or, “I want to go to the movies because everyone else is going”. So, I guess you have to be pretty clever to get something like that. But, I guess there can be flaws too. What do you think of this type of parenting?