4 and not 5, because there are places in assembly where the shelf meets the frame that are not "Perfection". However, the cart is heavy and the wood is pretty, and because it is unfinished, I stained with MinWax Pickled White-was ~ took very well the stain. Looks and functions great!!!

Pros: The wood is very nice and smooth ~ ready to paint or stain
Cons: Use some better wood-screws than the cart has included. (The nuts are fine.)