(This review was collected as part of a promotion.) First time using this product, I filled the water to the max with some vinegar to clean the kettle. When the water started to boil, it started to spit out hot water from the spout. Made a mess everywhere. I tried again with the water filled only half way up, and again, the water started spilling over once it started to boil. This is a real safety hazard. Not sure if others have had a similar experience, but I will be returning mine.