First day of my college freshman year, I purchased a Targus backpack for the heavy ass gaming laptop I had back then. I still use it decades later. It has carried stuff inside it for tens of thousands of miles, seen lots of abuse, weathered all sorts of conditions, and is still in really good shape. Not a single tear. Every compartment, every feature works the way it did on day of purchase. I'm honestly amazed every time I use it.

What if its just bad use? I have some nice Targus model that I actually bought a second one because the zippers were opening. To my surprise, in a few weeks I got my first instance of zippers opening. Of course, I was overstuffing a bit at the top. I remembered that I had removed some guards that transform this model from more like a regular backpack to a clamshell. Maybe that is a very important feature I have to use, or the zippers will fail, when you carry a basketball there...