I needed a close fitting pack that would allow me to care for my toddler (playing and carrying her) and carry all necessities, but not so bulky that I would be knocking into people with it. The size and shape of this pack is perfect for my 5'4" frame, especially as my "personal item" when flying. I can easily hold all our daily necessities (diapers, snacks, stuffed animals, etc.), plus our coats, a tablet, books, a baby carrier. I'm still left with plenty of room for anything else. The phone/mp3 pocket on the strap is a very convenient feature. The material is sturdy, but the bag is still very light when empty. The organizer in the front compartment could use a zippered pocket, but it's fine. It also would have been nice for there to be some sort of pocket or divider in the main back compartment so you don't have to fish around for items. I keep frequently accessed items (wallet, keys, sunglasses) the outside zippered pocket - BC it's so deep I don't worry about someone reaching in and swiping my wallet, etc. A nice pack for the money.