this is one of my favorite cafes in manhattan. it's sort of out of the way, but that hasn't stopped it from becoming wildly popular. when i first started going, it was empty, but now it's always pretty busy - which sucks.
but it's still very cute and has a great vibe to it, which is why i still go there. not the place for quiet concentration though.
the coffee, tea and muffins/baked goods are great, haven't tried the sandwiches.
main reason to go though is just the ambience - it's got a playful yet calm feel to it that's very relaxing. great place to hang out and read, or chat.