I take the train into the city and this sling pack is great for carrying what I need to carry. I throw a power cell in the pack and am able to recharge my phone and tablet for the ride home. I am able to carry a few files, my phone & tablet, a pen & pencil and a rain jacket comfortably. The pack is well made and repels water nicely.I purchased this bag to replace my old gym bag that looked similar but was falling apart. I was drawn to it because it had the same amount of compartments as my old bag. I originally ordered the 17" and it was a little too small to fit all my gym necessities, so I purchased the 19". It is a little bit bigger and could probably go for the 18" if they sold one, but it doesn't seem to come in that size. Regardless, I love this bag. It is nice that it has a water bottle compartment, my old bag didn't have that. Lots of compartments for keys, sunglasses, odds and ends and there is even a cord for a phone charger or other electronic. I only have used this for the gym, so not sure for traveling or water resistance or durability. It seems pretty good so far, and I am happy with it. Probably a good work commute bag, or traveling bag. For reference, I use a 24oz water bottle at the gym and the water bottle compartment fits that well and so far no issues for both the 17" and 19".I got this for travel but have been using it every day. I got the large and it is big enough to hold my kindle and everything else I drag along while traveling. The separate pockets are great to keep everything organized. Our tour guide said several people had their wallets/phones stolen from their backpacks and to wear them on the front. This pack is perfect for that.Good quality, will last a long, long time. Several picked and hidden pockets!Perfect for traveling, touring, gym, shopping and everyday errands - not too big, but roomy enough. Four compartments so you can sort your belongings and get to them quickly. Inside slip pocket for wallet. Side pocket for water fits larger bottles. No key fob - but there is a hook for sunnies. There is a USB port - but I never used it. Very sporty vibe - so it’s my summer throw around bag.Muy buena recomendableThe bag itself held a pretty good bit. I did not give 5 stars due to the charger port messing up after the first use.For two years I used this type of bag from another manufacturer. I love the functionality and size of these sling bags. My older one started to fray (especially on the pouch for the water bottle), so I got this one. My first impression was that it's built very well. The water bottle pouch was made from different material than my older one, and this was an improvement.The big drawback of this item is the extremely small size of the cell phone pocket on the front strap. It in no way can fit newer and larger phones. It's about the size of an iPod touch. Maybe. It can't even fit a small wallet. I returned it, and I'll look for a different manufacturer.The price for 20"bag was adjusted to a suitable level rather than th £90+ tag that was on it. I got it for £28Really useful for taking out documents when travelling without removing from your shoulder- just twist the bag round.This bag was larger and more cumbersome than expected but may be serviceable for others. There are several pockets that seem to have no specific purpose except to shove things in. One pocket had internal pockets but were difficult to access. As for the durability, I'm unsure as I haven't had it long enough but given it's made of polyester (rather than much more durable nylon) I doubt it. The zippers don't appear to be very durable and allow limited access to the pockets.Muy buena calidad, el tamaño es ideal, muy amplia para portar lo que guste uno, la correa se puede cambiar al lado derecho o izquierdo, es muy cómoda. En lo personal la uso en el día a día cuando salgo a algún lado que crea que ocuparé cargar cosas ( como comprar cawamas (caben 2 de 1LT) cuando voi a carnicería, verdureria y mandado ;) sin duda también esta exelente hasta para regalo. Me gustó la marca .The sling bag was purchased for our Granddaughter's Birthday. My wife and I were very impressed with the quality and overall design of the sling bag which made it very suitable for gifting. Our Granddaughter was very pleased with the bag and all of its features ! Just note that if you want to use the USB charging feature you will have to purchase a power pack separately.