I was suprised reading this. I never read Birds of Prey before, so I didn't know what to expect. I was never interested in the previous title at all. I have to say I was suprised. This was better then I expected. I can't say it was really good such as Batman #1 or Batwoman #1, but solid. It was a solid story and art that somehow worked.
The bad guys in the story are a bit of a mystery and the whole back story with them not being friends with Batgirl anymore, could develop into a solid story line for future issues. I think this book, while nothing special, does have potential.
All in all - Good start and I hope it gets better - 3.5/5.