I had high hopes for this organizer.  Hanging cubes attached to one another *seemed* like a very good idea and one that I thought I needed.  However, in reality it was not as convenient as it seemed to be.

Pros:
+ Perfect for keeping everything in one place and keeping track of all your cubes, so you don't, for example, forget or loose one behind the hotel dresser.
+ The flap of the larger-single cube has a zippered compartment that is useful for holding smaller items such as collar stays, hair bands etc
+ Hook enables the cube to be hung behind a bathroom door or in a locker.

Cons:
- When each compartment is full, the cube can't be folded over and zipped closed without almost straining the zipper to the breaking point. So the traditional use of a packing cube to compress items to fit more into a small space is a no-go; the bag is unable to close.
- The hanger, while convenient, doesn't really serve much purpose as it's almost impossible to zip open the compartments and efficiently put things in and pull things out without making mess, while the bag is hung over a door.  The cube still needs to be put on a flat surface such as a bed to put things in neatly or to pull one item out without the other things being dragged out behind it.
- To provide the additional strength needed to keep its shape while hanging, this bag is constructed of heavier material than three Eagle Creek packing cubes combined. So if weight is a concern, this may be a disadvantage.

Conclusion:
I had originally bought this to help organize items on family trip that would involve planes and trains.  However, found that due to the Cons, it was better suited for car trips and boat trips.  In fact, I am going to be buying more for each member of the family to keep their personal stuff organized in the RV.

Overall recommended for those needing organization over compression. Good for RVs, boats, lockers and other uses where weight is not an issue and there is a need to keep everything compact, hanging and organized.

Tip:
If you're not in a hurry, wait for Eagle Creek's Annual Sale. It usually applies across all vendors and is at least 20% off MSRP.