it is not, but... if you share the buying with your roomates/friends and split the cost.. you save $$
We joined costco after our first born child . It save some $$ for bulky packs from Costco. you can name it from milks and others...
if you are a single, you are wasting $$ since have to buy a bulky packs....
Another thing I do to improve my membership at Costco is to "SHOP THE SEVENS"
Costco always flags their closeout/clearance items by a "7" in the cents position of the price. Just scan price signage for these 7's, and you may be able to pick up some very good deals
FYI Sam's Club uses a 1 in the cents position of the price, to flag their closeout/clearance items. In Sam's Club, "SHOP THE ONES"