The carrier is sturdy, attractive, spacious, well made and tries to be many things...a hand or shoulder carry; a backpack; and a rolling cart.  The handle only stays up for the rolling piece if the carrier is dragged behind you, can't push it forward.  Requires some strength in the carry/backpack positions and is cumbersome for those who are not strong.  Nice that the carrier can be seat belted into your car.  Nice for the pet in terms of view space.  Best of its' kind I've seen but too heavy for me.