Instruct: Classify an Amazon review as either positive or negative.
Query: Worst thing that ever happened to us during the night...

We exchanged another bottle warmer for this one and we were incredibly disappointed. The bottle is never the right temperature and the water levels for the side vials are incredibly hard to achieve. It has boiled MANY bottles right over the side and onto the counter, causing a huge mess and horrible smell-think fried baby formula. It has also boiled bottles over onto our bedroom carpet at 3 a.m. Additionally, we have twins and it won't warm another bottle after the initial one for ten minutes. Save your money!