I was a little disappointed with this product, for several reasons:
1) the assembly instructions were dreadful - examples are the list of components was printed on the back of the sheet referencing the components on the exploded drawing, so you could not simultaneously look at the diagram and see the component description! Also, the exploded diagram was of such poor quality you could not tell which bit the arrow was pointing at - I had to start from first principles to fathom the steering linkages, and it took me ages to get it right.
2) the build quality was poor - examples are that after only one short rainfall the trolley was already going rusty ! Also, if you folded down the sides the steering was fouled so it was impossible to use this configuration at all. And there was no way to fold down the front and back and set the sides to stay upright, since the only support for the sides were the linkages with the the front and back panels.
3) all in all I think the manufacturers need to take some time out and get the assembly instructions right, set up a method for using the fold down panels properly without fouling the steering, and finally, but by no means least, devise a way to apply a BRAKE - we have sloping ground and when the trolley is fully loaded it gets pretty scary trying to control the thing!