I was recently contacted by the distributor of this item through the Amazon network. I'd given it a 2 star rating, some of which is quoted.  "...The exterior zipper kept unzipping which led to the bags contents being constantly exposed and/or items falling out..." I contacted the distributor and they told me that they did indeed have a batch that was poorly constructed with inferior zippers and offered to send me a replacement. I received it today and examined it for the faults that I found in the 2 star bag. It really looks like it will work as I originally expected. So I now feel that this is a smart design and in addition have a distributor who is willing to stand behind his product. I'm anxious to try it on a few trips and see if I'll return to this rating later with a fifth star.

An item with good support from the distributor and manufacturer is rare and I like that!