I got the two-year Apple Care and figured that I will have the phone for atleast two years and since you can't only add one year to the one year warrenty I got the two-year plan. I think it was worth it certainly because it covers the battery.
because the it was only $69 plus tax. So, I walked out the door with a new iPhone the 2-year AppleCare for a total of $502.91. Pretty satisfied with AppleCare on all my Mac computers and Apple products. The wait isn't that long at the genius bar (best to get an appointment), nor on the phone with AppleCare, and they've been able to answer my questions and resolve my situations.