This cart was expensive but it really can hold the weight.  I was concerned that the plastic wheels would break but we extended the cart to 50 inches and put 500 pounds on it multiple times.  It also rolled over cracked concrete and rough asphalt in parking lots without any problems.  This cart folds up a little smaller than some other platform carts so it fit in our vehicle without a problem.  We cut our load and unload time in half because of the larger capacity.