I purchased a few sling-style bags for an upcoming trip and this was the winner! This bag seems to be relatively good quality, considering the price. I used it for a four day trip to Florida this spring. Many of the features seem well-thought out and intentionally designed. It easily fits my iPad mini in the largest compartment and an average size water bottle fits in the side sleeve (I have this one, but it's similar in diameter to an adult size OTF Nalgene, which I believe would also fit&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Nalgene-Kids-OTF-Bottle-Blue-12-oz/dp/B00R1FOAKI/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Nalgene Kids OTF Bottle, Blue, 12 oz</a>). The pocket on the strap fits small items, like credit cards or keys. I was able to use it with touch cards (hotel keys, subway cards that you "tap" to use) without having to take them out of the strap, so that was a nice bonus. I liked the sunglasses strap on the strap also; not the most secure, but good for short-term storage rather than putting them on the front of your shirt. The organization in one of the pockets isn't amazing (my phone, Moto X4, doesn't really fit in the phone pocket), but it's functional. I like the hidden pocket against the wearer's back, great for storing a thin wallet and phone in a very secure fashion. I also like that the strap has an additional buckle to make the bag easy to take on and off if you don't want to duck into it. Very minimal branding on the bag I received also, only one little logo on the back of the strap, not even visible when wearing the bag.

Size comparison photo with an iPad mini and&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Sling-Bag-Chest-Shoulder-Backpack-SINOKAL-Casual-Crossbody-Shoulder-Triangle-Packs-Daypacks-for-Men-Women-Canvas-Digital-Camera-Bags-with-Charging-Port-for-Sport-Outdoor-Gym-Travel-Hiking-Purple/dp/B075QF71P4/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Sling Bag Chest Shoulder Backpack SINOKAL Casual Crossbody Shoulder Triangle Packs Daypacks for Men Women Canvas Digital Camera Bags with Charging Port for Sport Outdoor Gym Travel Hiking (Purple)</a>.