Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Diminished Quality

I owned 2 pairs of these shoes previous to my current pair. This pair, like its predecessors is comfortable, once broken in. However, the workmanship seems to have diminished. They colapsed after 3 months use. It turns out that the heels are hollow. I'm sad to change from a shoe that had been working for me, but I expect more than 3 months wear, even from what was a $50 pair of shoes.