I am a big Angela Carter fan, and so for me this is certainly an intriguing piece - one of the few works that reflects her stint living in Japan, and also contains a lot of the ingredients she would go on to use in later works such as her incredible The Passion of New Eve (Virago Modern Classics). This makes "Fireworks" essential for any Carter fan who wishes to understand more about the underlying themes in her work.
However, I got the feeling that most of the stories in this collection were her "B sides" - experimental pieces that didn't make the cut for her later, better collections. The stories lack the control and clarity of later works - there are far too many long, awkward sentences, repetition of words, and so many of the stories read far more like an elaborate description rather than an actual sequence of events.
If starting out with Angela Carter's short stories, I would most definitely recommend The Bloody Chamber And Other Stories (probably her best work), followed by Black Venus, rather than this collection. For fans of Carter, this is certainly worth reading purely for getting a greater "behind the scenes" insight into the author's mind.