Breville BKE720BSS The Temp Select Electric Kettle

This is an update on my Breville kettle, 3 years in. A few days ago the kettle suddenly stopped boiling water. Some other reviewers mentioned this too and ended up ditching the kettle. I tried to fix it. The base lit up as usual, and I tested it using another recent purchase a small 3 cup kettle with the same type of base--the base was working and it heated my back-up kettle. After reading the Breville instruction manual again, I spotted something I had never done--descale the kettle. I would look into it every now and then, it did have a slight grayish discoloration, which I thought was because of the heating element. That was actually lime scale, and it will eventually stop the kettle from working. I first used vinegar and a soft brush to try to get it off without much success but I could see the areas where I had brushed had cleared a bit. The instructions say to clean periodically with a descaling product or a vinegar and water mix, and boil. Since the kettle wasn't functioning, boiling wasn't going to happen, so I tried putting in 2/3 cup vinegar and then filling with BOILED water to the MINIMUM fill line. I let that stand overnight. The next morning I was surprised to see the kettle back to it's new gleam on the inside, and happily, it is now back to boiling. I still love this kettle, and am keeping the 5 stars. The feature I love the most is the auto shut off and it boils quickly. As with everything, it pays to read and follow all the advice in the directions! Original Review: I'm giving this kettle 5 stars because I t's the best kettle I've ever had! I've been using it for several months now and it performs beautifully. I haven't had any problems whatsoever. What another reviewer described as "rust" around the bottom of the inside is, I believe, some slight discoloration on the stainless steel as this is where the heating coil is located. I saw this too after the first time I used it, but it's virtually disappeared. It certainly isn't rust and doesn't affect the use. I am also in the habit of not leaving water sitting in the pot, just dump it out when we're done and leave the lid open to let it air dry. It does beep when the water boils and every time the pot is lifted off the warming plate. I don't find this particularly loud or annoying. I especially like that one can choose the perfect temperature for whatever beverage is being made.