It's actually really, really good, IMO.
Which actually surprised the pants off of me as I - like most - think Stephanie Brown is a whiny pain in the ass who screws up every thing and person she touches.
But this Brian Q. Miller guy is actually doing a great job of turning that perception around. She's still the same often-dopey character, don't get me wrong, but he combined a lot of good characterization and plotting to make the most out of her.
The book, to me, also has a vibe that's very reminiscent to the Batman stories of about 5-10 years ago (which were some great stories), which is a refreshing contrast to everything Morrison and Dini and others have been doing with the Batman characters recently.