There's nothing to it really, an electric water heater so I don't have to light up the stove, wonder if there's a small clean pot, stand there until it boils or forget and let it boil over, etc.
You fill this up, push the ON button, after it boils it turns off. You lift the pot off the base and pour over teabag or into steeping pot, whatever.
I like it because it's green and modern looking. Functionality is so basic there's nothing to complain about.
Like the previous reviewer, I noticed there was no specific OFF button (just the ON button) But the auto shut off worked fine. If you're worried about auto shutoff not working soon enough, unplug after the water has boiled. I don't want bells and whistles, literally, on my tea-pot. One switch is great and the size is perfect for a family of four at breakfast. It's not like we're trying to boil water for spaghetti!
Looks like someone beat me to a 5 star review, but I'm sure we are both very pleased we purchased the product regardless of the negative review.