Firstly, it's very light. Approx 750 grams, which is far lighter than any other comparable-sized bag that I own. So the bag itself will not weight you down, and will leave over 90% of your 10 kilogram weight allowance free for its contents.
Although it may take several trips to be certain of this, the material and the construction look very sturdy, despite the light weight. It seems to be made of some type of tough cloth with some added nylon. The zips have good-sized metal teeth and open and close smoothly.
Apart from the surprisingly-large main compartment, there is a well-planned full-length pocket, with many compartments, and a smaller outer pocket for quick access.
Perhaps to achieve its light weight, the bag itself does not have an especially firm structure or shape by itself, but will partly rely on its contents to give it its shape. The four compression straps on the sides will help to achieve this and prevent a less-than-full bag from being floppy.
The shoulder straps are padded and have a nice curved shape which keep them securely positioned on one's shoulders. Note that, unlike some other bags, the straps do not have a hide-away pocket, but this is not a big issue. The bag itself also has three large padded areas on the back, for added carrying comfort.
Although not in any way ugly, the bag is not especially stylish nor glamourous. So if you're looking to cut a fine figure or make a fashion statement as you stroll into your first-class cabin, then this might not be the bag for you. But if you want a sturdy, functional, light-weight, practical bag, then ... why are you still even reading this review, just go click on "Add to Basket"!