Intriguing name.... at first I thought it refers to the magical powers of the brownies, but later discovered it was referring to the nursey rhyme.
The sandwich is tasty. I would put it as very good, but it was not like the best thing I had tasted. The selection of pastries is good. It's a little more sugary than other shops. The Moreo is definitely worth a try.
The cafe have only few tables and is not conducive to gathering place. This would probably be the biggest knock against this joint.