How noisy are they? Like an urn? Can they be put on timer for when not needed eg. Overnight?
Does tea taste rank because of the oxygen being boiled out of the water so many times? From what I hear, the Quookers are good for delivering actual boiled, not just hot water.
Costs: how often does filter need changing (or anything else) and how costly is it? (Is it a diy job each time or do you have to pay to get someone in)?
How does the child lock setting work?
Tia