Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Design flaw

This basketball unit on paper seemed to be the best one out there in this class. However, I have now gone through 2 units and both have a major design flaw. By itself, the base is flat and sits fine. Once you insert one or both posts into it, it is very wobbly. This is due to both posts extend past the bottom of the base surface. The overall build quality is excellent, but this design flaw is forcing us to return this product and search for another brand.