I love Costco, almost to the point of being an obsession. I buy everything here.
Very clean store, nice and close to my house, and this one has a gas station and car wash.
Only downside (and this is with every Costco I've ever been too) is that it's always PACKED, long lines, hard to find parking. But, of course, if you shop here regularly you already know that going in.
Checkers don't seem like they want to converse, just want to get people through as fast as possible, which I don't mind because by the end of my trip I just want to get out of there.
Keep doing what your doing, Costco.