I enjoy the Kozii warmer. It's great to heat up my little one's milk, works really easily too. I got this one as a replacement for my original one, which Kiinde sent me without additional cost as my original one broke down!
Overall I am really pleased with the design and functionality. I do wish there was more room for variance in the water level. Switching between a bottle and a freezer bag needs different water levels to get the circular overflow just right, and the margin of error is only about a centimeter. Otherwise, it works about as well as any bottle warmer could I think, the circular flow is quite effective.
Kiinde warmer has been extremely unreliable when heating up breast milk. All of the variables such as bottle type and fluid ounces has remained the same but we get a different temperature bottle each time. This is a Replacement unit for the same issue the first time around.