My parents have used a Brita filter for years. For them it started out because they were fed up of descaling the kettle, as they live in a very hard water area

My parents have used a Brita filter for years. For them it started out because they were fed up of descaling the kettle, as they live in a very hard water area (lots of dissolved minerals) and the kettle would scale up easily. But they also always use the filtered water for drinking, because they prefer the taste now. My sister doesn't, she drinks it straight from the tap when she's visiting. But it's not at all about water safety. It's just about flavour and the longevity of the kettle (and the iron).