I bought this bag because I need all my stuff in only one volume to go travel.
I underestimate the size of this bag...I got the medium size and its HUGE...but also strong material...I do believe you can trust if what you want is a heavy dutty.
If you want to use for traveling or moving the smaller size will probably fit the maximum weight to take a plain! if you need to store your hause inside go for the medium and big size!
the con: there is not shoulder strap, and it quite difficult to find one to hold such bag when loaded!
Good choice for heavy job! I liked!