Stopped in to grab some dessert. Their signature things are the "crack pie" and "cereal milk". The latter was very interesting and quite good. The crack pie is just not worth the hype unless you are hoping to put yourself into a diabetic coma. I also had the corn cookie, which was quite good.
As someone has already said, the "Milk Bar" is just a really really cold room for you to grab something and go. You have to pay downstairs. Really, it's not worth the hype but if you're craving really really really sweet things, you should definitely make a visit here!