Klein or FLEX boxes?

So my work truck and tools were stolen about 6 months ago and I was under insured( I’m probably a little over insured now) so I didn’t get everything replaced. I’ve also started shopping at lowes because their politics align more with mine than Home Depot. So as I was getting some material the other I stopped and looked at some of their boxes. I was really impressed at the FLEX boxes, their drawers seem blow Milwaukee away and quite a bit cheaper. I also liked the Klein boxes. I love my Milwaukee tools but my packouts didn’t hold up like I expected. Has anyone had FLEX or Klein boxes and if so what are your thoughts.