AppleCare is worth it
In my experience, it is worth it. Four years ago, I made the transition from PC to Mac. The first machine that I had my first year, a Macbook Pro, was a real lemon. I had about a dozen visits to the Mac Store. Luckily, there is one in my city. Anyway, even after the initial warranty had lapsed, they still replaced the whole machine under AppleCare, or so they said. It is something that should have taken place earlier. Either way, it was no money out of my pocket.
Now, here is the most recent development. My replacement machine has been perfect for three years until last week. The logic board went bad. Basically, I was looking at a mid $500 repair charge. This, to me, meant that I was going to buy a new machine because I was not going to invest that much money in an old machine that is out of warranty. Well, luckily for me, AppleCare that I thought had lapsed was still in effect; therefore, no charge.
So, yes, it is worth it. It is just like buying insurance or an extended warranty. Look at it this way, if things go really bad, can you afford to replace possibly a $2k to $2.5k machine? If not, then think hard about AppleCare. Plus, from the long lines at The Apple Store, I think a lot of what Apple is manufacturing is crap. Don't get me wrong, I like the brand. However, you pay a premium for their machines, and I have dealt with more problems in the last four years that I ever have with all PCs combined.