Indispensable for the holidays by train, plane, friends cars, taxis etc, but it's expensive. Does not call in a flash in his pocket, must take a few minutes out of a taxi for example. However inflates very easily, we must say that unfolded there is no much difference between inflated and not. The advantage of this material is its booster, non-rigid, non-slip. There is a very well studied system for the belt is slightly deflected child neck and do not mind them. This is a well designed and quality product.