I use a sunex with a top lid and only one full width drawer, but the same cart overall. Its kinda junky, I mean dont expect supersmooth action and stuff, but it gets the job done, no doubt. With the single full width drawer, I noticed that it is wobbly from left to right, so you need to pull it straight out. As far as weight, I have loaded this cart up with tons of air tools and parts and it rolls around fine, so the weight capacity isnt an issue, just the cheap drawer. The pull bar across the front actually fell off once, because the sheetmetal screws backed out. A little locktite fixed that.
For the money they are not BAD, but dont expect amazing quality either, its still a cheap cart. Since this is made in china I presume, maybe check out the torin branded ones at pep-boys as well.
Jim