Instruct: Classify Amazon reviews into positive or negative sentiment
Query: bad wheels

We bought only the stroller since our son was too old for the carrier. The stroller has so many wonderful features like the ease in folding the stroller, the net covering to shade and keep bugs away. I can go on and on. We thought the stroller was well worth the money. But it is essentially useless since the wheels fall off everytime I use the stroller. It makes it unsafe to have them detach, especially when it happens while in use! If they fix this problem, the stroller would be wonderful.