It's actually only americans who unaccountably make do with these horribly underpowered kettles. The rest of the world wants their tea and they want it now...
tl;dw -- kettles in the U.S. only take about 4+ minutes to boil a liter of water. So when you say "now" you really mean it.
- Amount of water
- Initial temperature of water
- Position of water container
They also prevent superheated water accidents.
Plus, when you reduce the heat the heat reduces almost immediately.
Nothing else compares with the speed it works that I've ever used before. Definitely worth the upgrade in time saved at the stove.
You can improve that by using less water, but I would still like to double the power.