I bought this backpack purse for a trip to Europe -- I have other PacSafe purses, but wanted a small backpack to hold more stuff and get through airports.  I knew it was more of a backpack purse than a full backpack, and it was just what I wanted.  I managed to fit my Kindle, iPad mini, full wallet, small camera, and a lightweight sweater. It was definitely full, but held everything.

In a busy square in Europe full of tourists, we were warned about pick pocketers.  Out of paranoia, I did put the backpack on my front, but when I got a giant ice cream, I moved the backpack to my back.  Interestingly, I did feel somebody put their hand on my backpack but because the zipper was locked, the backpack couldn't be opened and the guy scurried off when I turned around to check.  If everyone was in a standstill in a crowd, I think somebody might be able to open it, but it really would be a pain and they would move on to another mark.

This is what I loved:
- lightweight
- inside is bright so you can find things -- I refuse to buy purses that are black on the inside because I lose too many things
- definitely secure
- price here on Amazon can't be beat!

This is why I don't think it deserves 5 stars:
- like others said, the strap lengths don't stay in place so it just gets longer over time
- the inside could use more organization -- I wish there would be zippered compartments and the dividers in there kind of stretch so things fall out of the compartments
- there should be an outside pocket for things you don't need to be secure but easy to reach, like lip gloss or sunscreen.  There's a hidden back pocket that sits against your back, but I used it for my phone (which barely fit a regular iphone 6).
- wish there was a water bottle holder on the outside, but when I bought it, I knew it didn't have one so I suppose I shouldn't care that much.  But you may miss it nevertheless.