This is my 3rd Half Pint backpack, so I'm a happy customer.  I use these as purses - one shoulder for normal use, and I lengthen the straps and use both shoulders when I'm shopping and want to use both hands.  I like that it has 2 zippers on the main compartment, which makes it easier to get into and easy to find the opening.  I use the front part for my phones, mirror and lipstick - easy & quick to get to.  The little handle on the top is also nice when picking it up off the floor so that everything inside doesn't get displaced.  I find that most of my things settle to the bottom leaving me with room to put small bags inside when I shop - again, leaving my hands free to use.

Pros:
washable
good size
front compartment for phone
can use one or two straps
2 zippers on the main compartment make it easy & fast to open
I like that they come out with new colors
It would fit a child, but I'm an adult happy customer
Cons:
It can look juvenile if you pick the wrong color
I've picked the wrong color before.  :)

To sum up:  I'm an adult who uses this as my every day purse, and have for at least 5-6 years.  I've never had one break or fail in any way, even with washing it about once per month.  I'll buy another one soon.