We are tired of tea kettle taking forever to boil water. We drink tea almost every evening. A tea kettle is a little messy and heats up our kitchen. Our new Hamilton kettle boils our water in half the time, doesn't heat our kitchen and there is no mess. We have hard water due to being on a well. So far there is no discoloration or buildup of calcium. There is no noise so it doesn't bother the dog! It works so well we took it camping with us.