I love Costco! This particular one is great because it's never very crowded (are people in Madison not aware of the awesome-ness that is Costco?!). The staff is very friendly and helpful, and there are always lots of samples! I like to go at lunchtime on weekends to get a free "meal". FYI you do need a membership to shop here, so go with someone who has a membership to see if you think it's worth getting. Memberships start at $55/yr.