First, it arrived completely assembled. Kudos to not having to assemble it.Second, I'm so glad I waited to get this. It was initially out of stock and I almost ordered the 3 in 1 convertible hand truck.The addition of the folding bottom platform for the 4 in 1 convertible hand truck just provides so much more utility. In addition to allowing you to carry longer loads in the cart configuration, the folding bottom platform reduces the amount of space it takes up when stored.The hand truck is surprisingly light, and despite being aluminum feels very solid. The folding bottom platform and handgrip bar are both made of steel. Heavy duty solid wheels and casters allow it to roll effortlessly. One possible improvement would be the inclusion of locking casters, but I cannot fault Cosco. The design is basically perfect.The engagement of spring loaded locking grooves provides very solid tactile contact with the frame when changing configurations. The sliding parts work easily and are not stiff. There is no flexing of any of the parts in the frame.The three different configurations as a stand up dolly, a 45 degree rear leaning dolley, or flat cart are very stable and easy to maneuver. In the 45 degree and flat cart configuration, the rear wheels are employed.I'm very impressed by the quality of this hand cart. I compared several other hand trucks from different companies, and Cosco is the only company with the folding bottom plate. It's a very unique feature and very well engineered. Well worth the money.
Rating: [5 of 5 Stars!]