I bought two hampers and each had a slight defect that I discovered while trying to put together.  I didn't feel like going thru the hassle of returning them so I figured out a way to make them work.  One wheel would not screw in more that a couple of turns so I just unscrewed the other three to match the height of the defective one.  The second hamper had a warped/bent top piece so one side was slightly higher than the other.  I opted to not use the spacers that were included on one side and was able to make it work.

Pros: I like the finished product.
Cons: Both hampers had defects