I received this bag the day before I left on a trip to Universal in Orlando. I had been using a back pack purse but one of the arms had come un-stitched so I needed a replacement that was reliable and could get me through air travel and be secure and easy to carry in the park. I was wary at first because this is an over-the-shoulder bag, and I was worried about how it would feel compared to my previous bag. It didn't take much time to acclimate to the new bag at all.
This bag has more than enough storage to hold several paperbacks, wallet, keys, cell phone and it even has a water bottle pocket that held all the bottles I shoved into it over the weekend.
My aunt has this very same bag, and she said she disliked it because of the need to swing it around in order to get anything out of it. I've been using a back pack for more than 3 years so this was not an issue for me. But keep that in mind if you currently have a standard purse: You'll either need to swing it around your body or take it off to access the items stored in this bag.
I like how I can slide it around when I sit down so I don't have to take it off all the way.
Kept my stuff safe even though it was on my back, but I'm used to a backpack, so remain vigilant if this is new to you.