The box is nice and big, stable and can be in the car with the seat belt mount. I do not think that the device for the belt keeps in a car accident, so I deducted a point in the standings. Otherwise, I think the great box. It has yet to fill enough "air" the box with towels, so that the animal also feels especially after the vet visit. The flap for stroking is also great (but only until the animal has been found that it fits through the opening) for soothing). Overall, I am so happy.