I am writing a review in regards to this particular Costco on Pavillion Center in Summerlin and not about Costco in general. I love Costco. They have the best selection of meat and produce in town. As long as you are smart enough to know your prices and realize that you do not always save money by shopping at a bulk warehouse you cannot go wrong at a Costco.
This Costco is about the quarter the size of most Costco's across the country. Because of the size this place is almost always crowded. Weekends should be avoided at all cost. It can be very hard to move down the aisles with all the people and their carts. The parking is a nightmare here. The check out lines stretch down the aisles. The shopping carts are never brought back into the store so they pile up all over the parking lot. I think they could not build the usual size Costco due to land costs? But I am not sure why this is the only one on the West side. They could easily put another same size Costco on Tropicana and/or Rainbow and that would help to reduce the crowding.
The size of the store also limits the the selection of items. I can go to a normal size Costco in Reno or Salt Lake City and they carry additional products such as Rockstars and Jiffy peanut butter. But because of limited space here they cannot offer everything that you may normally find at a Costco. Buying books at Costco is great because it is cheaper than anywhere else. But at this store the book selection is very small. They say you can request items but rarely will they stock it for you. They also are constantly having to rotate items in and out. So something that was stocked on Monday may not be there on Saturday.
Despite the crowds the staff is friendly here and depending on the cashier they do move you through the check out line at a pretty good pace. If you can come on a weekday right when they open or just before they close you can move around pretty well.