--> Assembly was easy though some parts were not marked and different types of screws were jumbled together in a single packet. It was an enjoyable puzzle to solve. --> Extra screws were included, which was nice. --> The support structure appears to be steel, but pretty thin steel, so not as sturdy as you might imagine from seeing the picture. Turn the screw too tight and the metal begins to indent. FYI I'm an elderly lady with arthritis so I'm not talking about gorilla strength here. --> I purchase cleaning chemicals from Costco that typically come in larger sizes. I wouldn't want to store too many of them in the bottom tray as the weight would probably be a problem for this item. --> It rolls well (keeping in mind to not add too much weight to it). --> the grippers for tool handles work okay. This is a nice organizer for light duty cleaning tools. Don't overload it and it should be fine.