I've been to Milk Bar in NYC and I like their cookies and cake truffles.
This time I tried their milkshake (Chocolate Malt)...while it was very good, it doesn't warrant the hefty price tag ($9.50) for a medium sized treat. It was definitely creamy and chocolatey, but at that price point, it's not worth it. It was a very good shake, but I probably wouldn't go back...unless someone else was paying ;-)