I don't leave many reviews, but I do for exceptionally good (or exceptionally bad) items.  This carry-on, convertible bag is very well designed and constructed.  I have to have a carry-on bag that converts to a backpack when I travel with my wife who is in a wheelchair when she is in the airport.  This means I have to have my hands free to push her if necessary.  The bag has lots of pockets and is a great size for carrying-on.  The backpack straps are comfortable and the chest strap really helps keep the bag in place.  I tried on the waist belt, but probably will not use it most of the time for my application.  I would highly recommend this bag for someone like me who needs it as a backpack part time.