Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Mostly good

We bought these balls so that our daughter could turn her swimming pool into a ball pit when not able to swim. For the most part the balls are pretty firm, but about 10-15 came pretty deflated. They work for what we are using them for and we purchased them on sale so I'd say we are pretty pleased. I'd be unhappy though if bought at full price.