I have been using this sling bag for nearly a week now. The quality of interior and exterior is very good and not made of cheap material. I have tried the cutter slit test if the textile as well as the rubber bottom are anti theft and it was true. I tried the water proof test using a half glass of water and it proves its credibility. I love that I feel like my essential documents and gadgets are secured because this sling bag is all weather proof. Very unique, stylish. Some reviews cons is about the optional strap. It is true that its a little bulky and can add more weights. However, the positive catch is makes the sling bag more secure, and anti theft, definitely will not be able to easy pull away from your body. Its comfortable because of the padding and can easily be adjusted. I have all my trust to ALPAKA that this sling bag will last for years. So for now, I can say that I am 100% satisfied. If I don’t make any follow up (Which I always do in my reviews) after a month, 6 months or a year, it means this sling bag is still doing its job very well.