It was interesting, but I wouldn't call the art "great". It just seemed off to me. Some specific examples:
Page 12, panel 1 - Riddler looks like he's about 90
Page 13, panel 1 - Everything about Bat's looks misplaced
Page 13, panel 9 - What the heck is up with that Batman??
Page 18, panel 3 - Batman looks far too skinny, and it looks like he's a size small wearing a size extra large shirt the way its all tucked in to his belt
I mean, overall, the art's not bad. But I wouldn't call it great either.