Instruct: Classify a given Amazon review as either positive or negative.
Query: A great idea, but heating is too inconsistent

I loved the idea this product offers, especially for middle of the night bottle feedings. However, the reality for me - maybe it was the unit I had - was that we couldn't get a reliable standard of warmth to the bottle and ended up with milk that was just too hot or too cold (more hot than not). It was more unpredictable than using the microwave. I really worked at it to find a reliable method of warming bottles, but at the end just got rid of it. I ended up using a smaller portable unit that gave me better service. I'm happy to see that there are parents out there who got great service from this unit, but unfortunately it didn't work for me.