I'm going to get a neverfull MM to use as a diaper bag. I actually like having the unzippered top so I can get into it quickly, and I always keep my wallet and cell in the zippered compartment to make sure they're secure. I'm currently using a BV for work and outings with my kids. It's a great bag because it's roomy, easy to get into, and it's deep enough to help prevent things from falling out.