If you have AC on a covered item say a 13" MBP if the logic board is bad and you make an appointment, do they repair it while you wait, or do you have to drop it off for a couple of days?
As to whether it's worth it or not, that's a matter of opinion. You'll find lots of opinions on both sides. If you want more information, here are just a few of many threads on this topic, found by searching the forum with MRoogle: