Not really worth buying one, we have one, only because we where given it as you can’t make tea with it. There is one out now that is hotter, but takes as long as a kettle to boil.
We too have a baby, and use a kettle to make the milk up (just make too much for tea, and leave to cool completely, always given our baby cold milk), however wife does like it for the small amount of times, she makes up powdered baby food, for when she is out. Goes in flask and is at a better temp when needed (not as hot).
I only use it for quick coffee in the morning, however i would say not as good as a kettle again, because its not as hot.