I wanted a smallish bag to use when we go to festivals, concerts, ball games etc., so I don't have to lug a big bag around.  This one is really nice, it has a carabiner lock so that makes it more secure in crowded venues. There are enough compartments (but not too many so you don't forget where you put things) and they are big enough to allow you to bring the necessities. I have a small wallet but it didn't fit but this bag has slots for license and credit cards and a zipper pocket for change and bills so it works. I like to option to use it as a cross body bag as well.