I'll be the dissenting opinion here.
I think paying ~20% of the cost of a computer for an extra two years warranty is a terrible deal. I have owned multiple iMacs and MacBooks over the last ten years and never once had an issue that I would have used AppleCare for. With the well over $1,000 I have saved on AppleCare I could easily pay for any repair on my current machine and still be ahead.
It is just an an insurance policy Apple is selling to make more money.
Now if you think you will need hand holding over the phone from Apple all the time for questions, there may some value in that part of AC for you.
Check with your CC company. Most and VISA or Amex card now gives you a second year of warranty coverage for free now if you use there card.