I was tempted to return the entire set as it was frustrating assembling the pieces.  One of the #1 screws was difficult to screw into side piece (E) and (B)  as the the 2 holes where the screw was to fit was not aligned probably.  We wasted 2 hours trying to fit the pieces together.  Also, another piece (E) was warped and the screw is showing after putting it together.   I also was disappointed that it did not come preassembled.