I had high expectations for this backpack when checking out the product listing and wasn't let down when i finally received it. The backpack is made of flexible but strong materials that give a high quality feeling. It has a perfect combination in rigidness and flexibility that make the backpack maintain its form when it is empty. Also even though the product description says it is a good fit for a 17 inch laptop, the first weekend i used it for a hiking trip and was able to stuff in a lot more things for the day journey. Also for backpacks I always pay attention to the straps, as i like to have the feeling the straps will stand up for the heavy work. And these straps seem very well stitched and that will stand up to the work. Further testing, I know the product description says it will stand up to 35 liters, well i didn't exactly put that weight on to it, but did use it with a approximate 23 - 25 lbs and the backpack felt good and comfortable with that weight. On the other side, this is just a observation as it is a personal experience, i am 5.5 feet tall, so when being carried empty the backpack seems a bit too big for me, but that view and feeling disappears when i carry it semi full.