There are many features of this curling iron that I really like: the auto timer which beeps and stops the spinning after the right amount of time so no guessing if its long enough.
the tangle sensor which immediately stops the spinner if your hair gets tangled in the unit - and yes, that did happen once!
How beautifully it curls my very straight, very fine hair. It's almost too fancy for everyday but it's not a big deal because I can always brush it out a bit or curl it for less time so the curls are looser. As others have mentioned, it only curls the bottom half of your hair but that is still a very pretty look.