One of the things with AppleCare One, especially with mobile devices... and if you use them a lot. They include battery coverage. (My iPhone battery went below 80% at around two years... my MacBook Pro Battery around 3...)

So if you factor THAT cost into it, knowing you're going to get a new battery in there... it actually makes the insurance portion really cheap. (I also have used the Accidental damage a few times over the year... so I'm pretty sure i've come out ahead if you include all that in.