depends what you buy.

If you are fortunate to be able to buy Cubans, assuming you live outside of the USA, it is my understanding that most Cuban cigars should be aged further. About six months I think. Someone correct me here please if needed. CC?

However, if you live in the USA the cigars you'll most likely buy are Dominican or Nicaraguan or God forbid Mexican (ugghhh! Sorry, I can't stand Te-Amos)

Most of these SHOULD be OK right out of the box. BUT, I don't believe that. I may be wrong but it seems to me that many manufacturers are shipping very wet (humid) cigars. Arturo Fuente for example. They're a great cigar but unfortunately they don't taste good right out of the box. I've found that a resting period of about one month does them a world of good. Fuente has been shipping their cigars with one of those little Humi-Paks enclosed. I'm not so sure that's really a good thing.

The "resting" period thing have is one you'll have to decide for yourself. Many cigars are fine right from the box. Others seem to need a little time to stabilize.