I bought this for my 10 year old this Halloween, based on the mostly positive reviews, and also because it was different than what most of his friends were going as.

The Good:
Simple and sinister.
The idea of the glasses is neat.

The Bad:
The glasses had a short or a broken wire or something, because instead of fading in and out, they kind of sputtered (I don't want to say they flickered, because it didn't really look cool at all), and eventually stopped working.

The Not-So-Good-But-Not-So-Bad:
I ordered a Large, which is rated as a 12-14. My 10 year old was too tall for it to be real flowing. It covered his arms fine, but the bottom of the robe didn't even get to his ankles, more like mid to lower shin. We compensated with black pants, which, in the dark, took care of the problem.

The End Game:
The idea is good, but the costume is cut small, and the glasses are a gamble. Seeing that it wasn't on sale, I would say you'd do better going with something else.