I recommend Applecare strongly and have had it (and availed of it) on both my MBP 15" (HDD failure, replaced no problem, when it was two and a half years old), and my MBA (mag-safe adaptor and keyboard replacement, and again, no problem, under Apple care; the external MBA optical drive had earlier been replaced under warranty).
I'm a switcher, one of those who bought into the Apple universe as a result of the iPod.
Back in 2006, I bought an iPod as I was heading to a country for a few months where people could not really talk to you without consequence as it was a police state (I was observing elections there in an official capacity). Needless to say, I loved the iPod, an invaluable companion in a country where phones were monitored along with the people.
Anyway, a few months after my return home, the HDD on the iPod died, and, as it was still under warranty, it was replaced without a murmur, or an attempt to seek refuge in contractual small-print, by Apple.
I have had another iPod die, years later (both were classics) and the same thing happened; I was offered a refund, repair or replacement.
So, when I 'switched' to Apple, in 2008, it was not just because of the exquisite design and form factor, or the technical elegance of the OS platform, but was also, for the after sales customer care.
And Apple Care is a part of that. Yes, some may view it as expensive, but I see it as affording me peace of mind for three years.
Moreover, it actually does enhance the value of the device, if you choose to sell it on, subsequently; potential buyers like to think that Applecare is part of the package. Certainly, when I sold my MBP, the fact that it still had a few months of Applecare to run, didn't hurt me at all.