I definitely agree with Frank, was there with the boyfriend yesterday and while the waits were crazy, we didn't know where the line for the shakes started - people waiting for the actual restaurant, or worse, people just hanging out, blocked the view. So we thought there was a huge line till we finally started asking and discovered the roped off line...
Aside from that, we loved the atmosphere of the place and the simple variety of deserts offered is astounding. Absinthe is a cool touch - a rare but definitely steam punk suited touch, it adds another element to the theme. Met Penelope and the actress was great - hilarious, totally in character and honestly she had a better "british" accent than the Harry Potter actors in the parks.
Finally got our one brownie shake and I have to agree with some previous reviews - while tasty, the shakes could use something to thicken them up. I love the use of the brownie though, the desserts in the shake as well as on them definitely add to the richness.
Overall I will be back next time and buying some treat, without a doubt. By the way did everyone know the paper on some of those treats are edible? Thought that was a really cool touch! Will upload pics in a bit.