As a WHISTLING kettle I must rate this a failure. IF I am in the kitchen and do NOT have any music playing, or NOT talking to someone, I may hear the whistle. 
I ordered this kettle for a whistle that would allow me to hear when the water was boiling while was in another room. I cannot. It does not leak. Water boils in it. It does, just, hold 3 quarts of water, no more. It is useless as a whistling kettle.