Loving this little bag. I bought the black one with gold zippers. It blends with my cloths and lets me keep track of all of the things I have to have all day. I use it at work every day where sometimes I carry two smartphones, a pager, a cordless landline, about 15 keys, earbuds, a pen, a few disposable gloves, and lip balm. I wear it around my waist and all of that goes in it with room to spare except the cordless landline which I clip onto the strap of the bag.
I also use this when we travel to carry just the items I need to have at hand while en route. I usually wear it crossbody and wear a light jacket over it so it doesn't count as a carryon item and it's mostly out of sight in crowded airports, etc. It fits our passports, my ID, cell phone, cash, a card, a pen, some lens wipes, a protein bar or two, earbuds, lip balm, tissues, charging cord/block. I can pack my purse in my locked carryon and have everything I need to get through TSA and complete flights without opening my carryon or getting my pockets picked.
I was surprised at how much I can fit in there. It's not tiny but it's definitely not big and bulky.
The shape of it seems to have a positive impact on how much you can put in there. Also, I find I can carry more in less space by carrying a single item and not, for example, a wallet. This bag has slots for cards in the inside lining. They're not great. You wouldn't want to use every slot. But I can carry one card, my license, and some cash, small individually wrapped things. There are two zippered pockets to secure cash or keep other things separate.
It has a good range of strap length adjustability for making it sit on your body correctly depending on how you wear it. And so far whatever length I set is pretty much staying where I put it. I occasionally tighten it up a little after days of wearing it around my waist at work with all or most of that stuff in/on it.
Great value for the money.
Overall I'm very happy with this bag.