My earlier first-generation Sparrow 30 has been serving me for over 12 years already; when the zipper broke, I squeezed it with pliers, and since then it has been working without any problems for 2 years now. The 40 model maintains an equally high level of quality, and the changes introduced are really well thought out. My unit already has sewn-in straps at the top, which was a surprise to me, because I hadn’t seen them in any photos online — it looks like Wisport is quietly introducing modifications to its products. The only thing I’m missing is a flag patch included in the set; for a backpack made in Poland, that would be a very nice detail.