This is a surprisingly large bag. It is roomy enough for my 7 oz gloves, 2 kimonos, workout towel and water bottle. It is made from single weave gi material, which makes it seem really durable and surprisingly lightweight. Fully loaded I can wear it comfortably on my back when I long board to training without any pinch in my shoulders or strain. the weight is fairly evenly distributed in the padded shoulder straps.
The material isn't incredibly soft, but since it is a backpack and not a kimono, i don't consider that to be a setback. The zippers are nice and strong, and so long as the bag doesn't get overstuffed, i expect them to last for quite a while.
All in all I give this 5 stars and call it a great deal!