I've been reading about how great they are compared to standard electric stoves. Borrowed a standalone one burner induction hotplate from a friend to see if it would be faster for making coffee in the morning. (I have a standard French press and every morning I boil water while grinding the beans in a hand crank grinder.) The stove takes ten minutes to boil enough water for my coffee. Just tested out the induction burner (had to buy a kettle that works with induction since the only pan we own that works with induction is a cast iron frying pan, and the kettle arrived this afternoon) and it literally took 3 1/2 minutes to boil the same amount of water! I'm sold. For now I'm going to buy a standalone burner of my own but when it comes time to replace our stove I will most likely get one with an induction cooktop.
The burners aren't cheap. The one I am getting is $83. But the time and electricity savings are totally worth it.