I just finished this study and I found that the first half of the study, the first six lessons which is the first six chapters of the book of Daniel, was superb. The questions were relevant and thought provoking. However the second half of the study was somewhat of a let down. While the first six chapters of the book of Daniel deal with the events of the Hebrew people at that time in history, chapters seven through twelve deal with prophecy.
Now I don't know if the authors didn't wish to get into the whole prophecy thing or they just wanted to keep the study on a general level, but I found that that the questions were very shallow and some were confusing.
This study would probably be ok if a person has never studied the book of Daniel or you just wanted a good overview, but if you want a more in depth study then I would suggest you look elsewhere.
I give this study a 3.5 out of 5.