THE GOOD: Although made for use with their website and online videos (all free), B'nei Baruch's collection of Kabbalistic texts can be studied individually or with a group. The texts are all translated from Hebrew and are otherwise difficult-to-impossible to find in English. At Amazon's price, it's a steal!
THE NOT-SO-GOOD: Some have criticized B'nei Baruch's translations in the past as leaving out key parts to promote their own agenda. I do not know Hebrew, so I can offer no personal experience. There have also been accusations and suspicions that B'nei Baruch is a cult, and there are certainly some oddities within the group. Again, though, I cannot personally verify this to be true--but as with any spiritual group, it is important to do background checks and be comfortable with what one is getting into.
OTHER NOTES: If you are a beginner, you should probably hold off on getting this textbook. Once you have progressed to the point where you are ready for more challenging concepts, get this book. If you are a student of B'nei Baruch, this textbook is obviously a must have. If you are a student of the Kabbalah Centre, this textbook will do you no good--the teachings are not compatible, not matter what the Kabbalah Centre claims.