I bought this bag as I already have an older model that I love.  I love the improvements except the ability to actually lock my zipper is impossible. The clasp on my older model has the ability to pull it out of the tiny hoop so that one can easily lock the zipper.  I am sending my new one back as I am totally unable to lock it.  The clasp is on such a short "leash" that I can not lock the zipper.  The attachment is also too short to  be able to pull it out of the "belt loop".  After several attempts and two broken nails, I never was able to lock the zipper. Also, the previous model has a pocket on each side.  One for an umbrella, and an expandable one for a water bottle.  The newer model has done away with the umbrella pocket. They have made some nice improvements on the inside, but it will not functions as well as the older model.  I am so disappointed.