My girlfriends and I are headed to Chicago for the first time soon. I grew up in NYC and really miss good Dim Sum. I've taken them for Dim Sum here in Minneapolis, but it was only mediocre. I am looking for a place to take them for a really solid meal. We would prefer a place with cart service over menu service. Cai and Ming Hin seem to get the best reviews. Do either of these have cart service? Is there another place you would recommend?