I have a temperature control kettle, which I think for the last so many years I've had it, has been the bees knees (an old British term for good) for me.
I think its much better than scalding yourself drinking tea or coffee (personally I don't like coffee, unless its latte). It is also good for cooking, like fermenting yeast in a more controlled manner, than over either a stove, or waiting for boiling water to cool down a bit for the right temperature