I purchased the 5-Day Mule bag for a trip to Japan. I traveled to four different cities over a week and had the bag with me on planes, trains, subways, buses, cars and almost a rickshaw but I couldn't bring myself to pay another guy to pull me around. I'm really satisfied with the bag. There was plenty of room for all my clothes in the main body and as I purchased souvenirs I was able to add them in and make more room by loosening the side straps. The front two pockets are good sized and fit my headphones, electronic cords, book, and other quickly accessible items. I had a large water bottle that I kept in the side pocket and used the strap above to keep it secure. The quality of the material is fantastic, never had any problems. Straps are thick and it's comfortable to wear as well. The bag is small enough to easily fit into an overhead compartment on a plane so you can hit the ground running and not have to go to baggage claim. Overall, very happy with the money I spent and can't wait to take it on my next trip to Zion National Park.