I’ve been using this as my diaper backpack for about 5 months now and I love it! I have the Medium size but after using it I wish I had gone with the Large, as I have a 2 year old along with my 5 month old, so I’d recommend going with the bigger size if you have more than 1 little one. The Onyx color does make it a little hard to see inside the bag when you’re not around good lighting but organizing bags help. My only issue are the side pockets on the outside of the backpack I like to use the side pockets for a quick access to grab a baby bottle, however, it’s not so easy to place bottles inside the side pockets if the inside of the main compartment of the backpack is full. Other than that, I do really love the backpack! It is lightweight, comfortable, has convenient storage pockets, and is really cute! I love the Neoprene material as well, it is very easy to clean!