I am very glad to have ZuZu within walking distance from my apartment. This place makes Vilas neighborhood much more attractive. I have always enjoyed zuzu's coffee and food. They are not spectacular, but I don't have any complaint.
Nonetheless, if you are looking for a hipsters' cafe, then you'll be disappointed. It is really a family style cafe-restaurant than a place to bring your laptop to work. It's a great place to stop before or after your visit to the Henry Vilas Zoo.
Interestingly, they also sell milk and cheese in their mini market in the cafe. I don't know how many customers take advantage of it, but could be pretty convenient for people who don't want to travel far for some basic grocery items.