Not for us, but that may be due to our A) location, B) alternatives, C) purchasing selections, and D) dumpster diving habits (any other divers out there?!?).
A) We live about 15 minutes driving distance from the nearest Costco, and it is not close to other places we frequent. We are pretty conscientious about not spending our time shopping, let alone driving extra to do shopping.
B) I haven't found much of anything at Costco that isn't as cheap at Aldi. Plus, Aldi is more convenient for us as my husband passes one 1x/week. And it comes without the obnoxious daily email spam, consumer habit tracking, unnecessary electronics, .... Anyway, I'd rather support Aldi and the pricing on the things we actually buy is comparable. Which brings me to...
C) Purchasing selections. We don't buy much of anything other than regular groceries. I drive an electric hybrid (when I'm not biking to work and back) and rarely need to spend money on gas. We never, ever buy shampoo or most other household 'consumables' because we are frequent...
D) DUMPSTER DIVERS! We do shop at Aldi for groceries but pick up the majority of our food, carpets, shampoo, laundry detergent etc from dumpsters. ESPECIALLY during the end of the school year when the local ritzy colleges let out and students are throwing out literally family packs of cereal and tide pods. It is a mega win since we don't spend money, have fun, and save the environment. Oh, and we sell used carpets on the side from dumpster diving throughout the year since that is a common throw-out item by the students. We regularly can discarded tomatoes, dehydrate bananas, etc from this and usually have fresh (seriously) produce each week that gets tossed for very minor blemishes, most of the time none at all. It's equal parts exciting and depressing.
All this to say that buying my Costco membership this year has turned out to be quite a disappointment. I'm going to return it since they do have an excellent return policy and will refund my membership since I'm dissatisfied.