my 1-year-warranty is just expiring on may 1st. so i went to the apple store a week ago and got apple care. i feel much more secure now knowing that my computer is safe for 2 more years to come. beside that - with any problem i have i can always contact the mac support.
when my mac was just 2 months old the mainboard died - it would have cost 400 euros (approx. 600$) so if just that happens again - i´m on the safe site.