You'll like it. They're built like tanks, and parts support is readily available for most of them. I just finished refinishing an old SC cabinet I bought via craigslist, and had no trouble getting parts the previous owner had removed (he threw away all of the PrevenTip hardware, sigh). I also had no trouble getting a hinged lock bar in the color I wanted, and the caster kit is on my wish list. I'd have to try very hard to overload one; 5" drawers filled to the brim with fasteners glide smoothly. The rollers are also fairly easy to lubricate, and completely different than a typical rollerbearing toolbox glide. You'll see what I mean when you look at it.
All of my future tool and hardware storage will be Lista.