We love it! We’ve used it for both breast milk and formula and it warms them both evenly! We’ve warmed frozen breast milk and it warmed it perfectly. So happy with our kozii warmer!
We love our Kiinde warmer. Our first one's timer failed after a few months, but they immediately sent a replacement free of charge. It's much easier than running under hot water or warming on the stove. My only complaint is that it doesn't fit frozen bags very well; you have to be attentive and push the frozen parts down further.
Current one is broken. Requested a new one through warranty. It says it will take over a month to get to me. Very unsatisfied with the length of time it will take to get to me.