Notice she did say that it also depends on where you live. In Norfolk we have some of the safest water around, proven fact. I always use tap water and never have any problems. I don't buy really expensive irons because I've heard horror stories about them leaking, etc. I don't want to spend that much money on one and have it leak all over the place even though I love the though of the Olisio where it raises itself back up off the ironning board. My irons last for many years and the only criteria is that they have auto shut off and not a high price tag.
The water in Norfolk is the one thing that I do like about it getting colder during the winter. I can go in and turn the tap on and have ice cold glass of water to drink, no ice