This warmer is absolutely amazing until it breaks every time. Heats evenly, the auto timer is great, works on bottles and Kiinde bags alike. Loved how the water circulation worked and it was easy to keep it topped up to have enough to heat the whole bottle or bag at once. The first one made it about nine months before it stopped working completely. The replacement only made it three months. Bought a third since we were out of warranty by then and that one stopped working five months later. Switched to a cup of hot water in the sink until we weaned. If only it were made to last! Still on the fence if we'll give another one a shot with our second due soon.
Having been through a few different bottle warmers, this one is hand down my favorite. With my twins, it was a vital accessory - especially since they had specific nutritional needs coming out of the NICU. This bottle warmer preserved all the nutrients in the milk because of it's delicate way of warming by circulating water. With my third child, it is still a staple in my house and I am always at peace knowing the milk warmed is the best it can be for my kids.
We originally purchased our Kozii Warmer in May. There was an issue, but the company quickly sent us a replacement end of June/early July. Today is August 11, and the replacement warmer just broke. It won't shut off unless you unplug it. Two warmers from May to August. We're done.