Yes, yeah, yep, indubitably, most assuredly, indeed, and without a doubt.
I never buy any major purchase without it. I bought a 2011 MacBook Pro in June 2011 (go figure). Between the last half of May and first week of June 2014 (weeks before AppleCare ran out) the GPU failed 3 times. After the third time they said "we're just going to swap this out" and I received a brand new Late 2013 15" MBP. I pushed for more storage because they wanted to give me the 256GB model to replace my 500GB HDD and they obliged and gave me the high end model with 512GB and 750M.
The only cost to me was AppleCare on this new MacBook Pro. Well, after a year one of the thunderbolt ports failed. They replaced the Logic board (bill $600) that was covered under Apple Care.
In total, between servicing the 2011 and 2013 MacBooks and the value of the 2014 MacBook, the cost of two Apple Cares $700 resulted in $4,400* of value in return. That's a good investment.
*Two logic board replacements on the 2011 model, one on the 2014 model: $600 x 3
*New Late 2013 MacBook Pro retail value: $2600