Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Must have for newborn

We got this as a gift for our first baby and loved it! It keeps the baby straight in the car seat so they don't slump. I'm not a fan of wrestling with props and blankets, and no other headrest we tried even worked a little. We loaned ours out after our first baby, didn't get it back, so it was put back on our must-buy list for baby #2.