Just assembled the shelving today. It took 16 minutes by-the-clock to complete. Ok, so I watched an assembly video yesterday, but it was so easy and fast. I have loaded one shelf with 400lbs and another with 300lbs and there is no bowing or signs of strain. The finish looks to be baked-on enamel so should last without rusting. I would suggest that one assemble the unit where it is to be kept, as the "EZ Connect" feature is "EZ Dis-connect" if one lifts the unit by its horizontal bars or shelves to move the unit. Knowing that, I still rate this product 5-stars.