First of all, I would have rated this with a 5 but I agree with the one reviewer who indicated that the hook was heavy.  The hook is almsot heavier than the entire bag. Ok, maybe that might be an exaggeration, but it is heavy for no apparent reason.  I love the bag though and is the right size for me.  If you want to pack light, and need a bag that doesn't take up a lot of room, then I would recommend this one.  Also, I'm thinking about replacing the hook with a simple aluminum S-hook....as the hook easily detaches from the bag.

UPDATE:  I've traveled with this bag for the last couple of years now, and it has completely torn apart on both sides. First the right side seam ripped apart, shortly after I purchased it,  and then the left bottom portion. I've duct taped it and sewn it back together. I'm actually in Europe right now, and its barely holding on. Ive reduced my score from a 4 to a 2. I wouldn't recommend this bag, and there has to be better toiletry bags our there. Rick Steves should be ashamed to even have his name on these.