I love zip zip too. I've collected most of mine in pebbled leather, but I have a few in saffiano leather also. And they have done the zip zip in ostrich and croco and lizard, and I have a few of those also. Years ago they did a very similar style in the Alto collection, and I bought those also. Can't post pictures, but needless to say, I have a lot of zip zip satchels. I find them light weight, easy to carry (I hand carry), and they hold a lot of stuff. The design makes it easy to get in and out of the handbag and find what you are looking for. Add me to the zip zip fan club.
One question, even though you have lots of different colors, do you ever get tired of carrying the same style. I find that after a few days, I need to add some variety.