I have two of these - a charcoal one and a navy one.  It feels secure - the pouch on the back side has a zipper on the bottom so it can be slid over the pull handle of luggage.  There are clips for keys, change purse and more.  This is a great purse for travel (I brought one with me on my trip to Rome).  It seems sloppy even when it is not full.  I prefer a firmer and more fitted purse for everyday use.