I have not run the adventure just read through it. I think there is enough variety in the encounters here to keep most players happy. The NPCs are not the most exciting although the villain is excellent and interesting and her plot is horrid and sure to have players stressing to stop it.
For myself of particular note are the great additions in the toolbox. There are new magic items, monsters and other player rewards. There are also new backgrounds helpful for tying the player characters to the adventure.
I look forward to running this with a group new to the second edition.