I bought this bag there 10 days and I was very pleasantly surprised! It is much better than what appears in the picture, in fact you can even paste 2 portable 17 inch! Very clever, 3 main pockets and other side pockets. What I particularly liked is that it remains wedged it does not slip from the shoulder like other bags. My laptop makes 3.5 kilograms weighs almost nothing when I have it in this bag! Really a beautiful design. In terms of strength, too early to tell, but it looks okay to me a priori. The bag is quite rigid, which must be positive against shocks.