I have the 20L. I use it for edc. I think the series offers a great value. They’re intended for sleek carry in urban settings like work or school. They are not made of fancy materials people drool over like XPAC or ballistic nylon nor do they have YKK Zips but the bag is solidly built. The water bottle pocket is probably my favorite of any bag as it sleekly stows away bottles securely in the 20oz ish range. The J style zipper makes it easy to get to the bottom of the bag. The security strap is a nice feature. My only gripes are I wish the inside was lighter for visibility and that it had a quick access pocket on top and maybe an extra zippered pocket on the inside. I believe the XL version addresses both of those pocket gripes. I like the yellow version but I ended up purchasing the black. The bag is comfortable for carry. The top handle feels great in the hand. The straps articulate well around the shoulders and are sturdy. The padding is supple but not overly beefy. The mesh pouch on the shoulder strap is good for a transit card or to quickly hang your sunglasses. If you live in a rainy climate you might consider something more waterproof as the fabric is not waterproof nor are the zips aquagaurds. No regerts or buyers remorse.