A quick source of hot water is always a must in my book, though it gets much less use now that it's summer.
As soon as you plug the device in, a blue light comes on,
which turns red while boiling.
This feature is useful as it reminds me that I have hot water available, which I am prone to forgetting mid-boil, and to unplug the device after use instead of leaving it plugged all the time. While other people might not need this reminder, I definitely do.
Avoid vampire power, unplug your devices after use :)
