Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Attention black tea drinkers

As other reviewers wrote, this kettle is slow to turn itself off. With mine it takes maybe two minutes of boiling before it does; however, I wonder if that's intentional. Years ago, my mother (from Ireland) said that to make a good cup of tea (black tea only), you need to boil the water for two full minutes. The main reason tea tastes so bad in many diners and restaurants in the U.S. is that they fail to use water just off the boil.What I love about this kettle is that it boils water in the blink of an eye. No kidding, this is the fastest of any method I've tried in 30 years.I'm taking one star off because of the uncertainty around the auto-off function. I don't completely trust it. Also, the on/off switch is flimsy. It wouldn't take much to break this, as happened to one commentator.