Cart so far seems sturdy, nicely constructed to where it seems like it will hold up for a while. Hi Lisa suggest that all wheels turn because when you have a little of a load on the cart, it’s very awkward the way the cart handles because only 2 wheels turn. Would seem logical, if the cart does support the weight posted, that all 4 wheels would turn to ensure a smoother, seamless movability. Building was a little wonky however, eventually you figure out how everything fits. I think I had to remove one side of the frames.