I purchased this to go with my carry all tote I received for Christmas. I realized that the bag itself didn't have bottle pockets but the organizer insert did. I really wanted to love it. Unfortunately it just doesn't hit the mark for me as an addition to my bag. However, It will work great on it's own for keeping diapering needs in my car or downstairs. The pockets are nice and big, and the grab handles and button are really nice for keeping organized and being able to easily move it to where I need to use it.
As far as a bag addition, I feel like it takes space away from the bag and makes packing a little more difficult. This may just be my personal packing style, but I feel like I could fit more without the insert. It would also be nice if the button closure could be tucked away for in bag use because it just gets in the way when you're trying to dig things out of the bag.