I have the US General tech cart (~$150 from the store) and mechanic's cart ($40 or $60 off Craigslist), both the 30" models. I don't see how I'd break them with my normal home shop/garage use. They roll fine, the drawers slide fine when loaded and the carts hold their square- no flimsy twisting crap. Even if a drawer slide or caster were to eventually wear out, replacing those parts or even the whole cart would still be cheaper than a cart from Cornwell, Snap-On, Matco, etc. for essentially the same box. If I were in the market for a roller cabinet, I'd get the one from US General as well. The one thing I did alter on my tech cart when I was assembling it was to use better hardware when bolting the casters on cuz I over-tightened one and snapped it. I could've replaced just that one but I wanted all of them to match. I bought my mechanic's cart used and it was assembled with the included hardware and it all seems fine.